{"title":"Starfield Optics","description":"","products":[{"product_id":"gear-series-80mm-ed-triplet-with-fpl53","title":"Gear series 80mm ED Triplet with FPL53","description":"\u003cdiv\u003e\n\u003ch3\u003eGear series 80mm ED Triplet with FPL53\u003c\/h3\u003e\n\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Starfield ED80 f\/6 Triplet APO will take your wide field imaging game to new levels. Using FPL53 (Ohara, Japan) optics, this telescope comes standard with heavy duty rings, extra long vixen style dovetail, and a handle designed to mount accessories. Weighing in at only 7.7 lbs, a large heavy mount is not needed.\u003c\/p\u003e\n\n\u003cp\u003eThe 2.5\" Rack and Pinion 2 speed focuser is designed to hold up to 12 lbs of gear. and a retractable dew shield is held in place with a single screw. No more rubber bands to keep it in place! To make your imaging experience even better the Camera Angle Rotator will let you frame up your object easily without adding flex or changing your focuser position.\u003c\/p\u003e\n\n\u003cp\u003eAn optional dedicated 0.8x reducer speeds up the optics making this a f\/4.8 imaging instrument. Perfect for those really large objects and wide field imaging.\u003c\/p\u003e\n\n\u003cp\u003eMulticoated optics are standard, and each Gear series telescope comes with a hard case and optical test report.\u003c\/p\u003e \n\n\n\n\u003c\/div\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45120143589595,"sku":"100025929","price":1300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/G80-06EDT-1.webp?v=1711549055"},{"product_id":"gear-series-115mm-f-7-triplet","title":"Gear series 115MM F\/7 Triplet (Special Sale)","description":"\u003ch3\u003eGear series 115MM F\/7 Triplet\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Starfield EDT115 f\/7 Triplet APO will take your wide field imaging game to new levels. Using ED Glass optics, and GÉAR series standard accessories with heavy duty rings, vixen style dovetail, and a handle designed to mount accessories. 2.5\" Rack and Pinion 2 speed focuser, and a retractable dew shield.\u003c\/p\u003e\n\u003cp\u003eTo make your imaging experience even better the Camera Angle Rotator will let you frame up your object easily without adding flex or changing your focuser position.\u003c\/p\u003e\n\u003cp\u003eWith a total weight of 15lbs, this telescope can still be used on modern 30lb payload class mounts. Collect more light compared to 102mm telescopes and gain high magnification with great focal length. Get an objective lens that is 20% larger than a 4\" telescope but without needing to upgrade to a larger mount!\u003c\/p\u003e\n\u003cp\u003eMulticoated optics are standard and each Gear series telescope comes with a soft case with die cut foam, and optical test report.\u003c\/p\u003e\n\u003cp\u003eAn adjustable dedicated 0.8x reducer takes this telescope to a new optical speed of f\/5.68 and focal length and 644mm.\u003c\/p\u003e\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2.5\" two speed rack and pinion focuser, with ball bearings, that is also fully rotatable rotation. Optional Motor focusers can easily be installed. Accepting 63mm accessories, and a pressure fit lock. Support for heavy camera loads and accessories.\u003c\/li\u003e\n\u003cli\u003eSupports 2\" and 1.25\" eyepiece accessories\u003c\/li\u003e\n\u003cli\u003eCamera Angle Adjuster (CAA)\u003c\/li\u003e\n\u003cli\u003eHD CNC tube rings and Vixen style dovetail bar\u003c\/li\u003e\n\u003cli\u003eHandle for transportation and mounting accessories\u003c\/li\u003e\n\u003cli\u003eRetractable dew shield retractable for transport.\u003c\/li\u003e\n\u003cli\u003eOptional 0.8x adjustable reducer and 1.0x Flattener available. Threaded for a secure connection to the focuser with no flex.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45120143687899,"sku":"100025930","price":1800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/G115-07EDT-1_900.png?v=1711551546"},{"product_id":"adjustable-2-reducer-for-70-to-90mm-telescopes","title":"Adjustable 2\" Reducer for 70 to 90mm Telescopes","description":"\u003ch3\u003eAdjustable 2\" Reducer for 70 to 90mm Telescopes\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Starfield 0.8x adjustable reducer and flattener makes finding the correct back focus easy! Fighting with adapters is a thing of the past! By adjusting the reducer to achieve 55mm of back focus is simple, and if more adjustment is needed for fine tuning all that is needed is a small twist. If you are using accessories such as filter wheels and rotators you can not still get the required back focus.\u003c\/p\u003e\n\u003cp\u003eJust add up the thickness of all the accessories, plus the distance to your sensor and adjust based on the table below and then set the reducer to the number that is calculated. The reducer attaches directly to the Géar 80 \/ 90 mm telescope focuser by removing the Axil lock.\u003c\/p\u003e\n\u003cp\u003eUsing the supplied 1.5mm Allen key, loosen off the three screws a half turn and then unscrew the lock. Thread the reducer onto the focuser.\u003c\/p\u003e\n\u003cp\u003eThis Reducer can also be used for other Telescopes than from 70mm to 102mm aperture\u003c\/p\u003e\n\u003cp\u003e102 mm \/ focal ratio f\/7 - 55 mm\u003cbr\u003e90 mm \/ focal ration f\/6 - 56 mm\u003cbr\u003e80 mm \/ focal ratio f\/7 - 57.6 mm\u003cbr\u003e80 mm \/ focal ratio f\/6 - 59.6 mm\u003cbr\u003e70 mm \/ focal ratio f\/6 - 61.6 mm\u003c\/p\u003e\n\u003cp\u003eFilters can be added inside the reducer.\u003c\/p\u003e\n\u003ch3\u003eTechnical Details:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesign: Corrector and reducer for refractor telescopes\u003c\/li\u003e\n\u003cli\u003eTelescopic connection: M63x1 external thread\u003c\/li\u003e\n\u003cli\u003eCamera connection: M48x0.75 external thread\u003c\/li\u003e\n\u003cli\u003eReduction factor: 0.8 xLenses:3 lenses with ED element\u003c\/li\u003e\n\u003cli\u003eCoating: Multi-coating and internal blackening\u003c\/li\u003e\n\u003cli\u003eWorking distance: Variable (adjustable)\u003c\/li\u003e\n\u003cli\u003eAdjustment range of the distance: 0-17 mm stepless\u003c\/li\u003e\n\u003cli\u003eSuitable for: Refractor telescopes from 102 mm to 155 mm aperture with focusers from 2.5\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45120144539867,"sku":"100025931","price":239.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/SF-FFRA-08-S-1_900.png?v=1711552320"},{"product_id":"adjustable-2-5-reducer-for-102mm-to-155mm-telescopes","title":"Adjustable 2.5\" Reducer for 102mm to 155mm telescopes","description":"\u003ch3\u003eAdjustable 2.5\" Reducer for 102mm to 155mm Telescopes\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Starfield 0.8x adjustable reducer and flattener makes finding the correct back focus easy! Fighting with adapters is a thing of the past! By setting the adjustment to 14.87mm with the scale, achieving 55mm of back focus is simple, and if more adjustment is needed for fine tuning all that is needed is a small twist. If you are using accessories such as filter wheels and rotators you can not still get the required back focus.\u003c\/p\u003e\n\u003cp\u003eJust add up the thickness of all the accessories, plus the distance to your sensor and subtract from 69.87 and then set the reducer to the number that is calculated. The reducer attaches directly to the telescope focuser by removing the Axil lock.\u003c\/p\u003e\n\u003cp\u003eThese reducers can be used on other manufactures telescopes as well. A M63 to 2\" push adapter might be required. Please contact us for details.\u003c\/p\u003e\n\u003cp\u003eUsing a 1.5mm Allen key, loosen off the three screws a half turn and then unscrew the lock. Thread the reducer onto the focuser. This Reducer can also be used for other Telescopes lager than 102mm.\u003c\/p\u003e\n\u003cp\u003eTotal Back focuser required based on Telescope model.\u003c\/p\u003e\n\u003cp\u003e102 mm \/ focal ratio f\/7 - 69.87 mm\u003cbr\u003e107 mm \/ focal ratio f\/6.5 - 69.0 mm\u003cbr\u003e130 mm \/ focal ratio f\/7 - 66.17 mm\u003cbr\u003e140 mm \/ focal ratio f\/6.5 - 65.8 mm\u003cbr\u003e150 mm \/ focal ratio f\/8 - 63.34 mm\u003cbr\u003e155 mm \/ focal ratio f\/8 - 62.57 mm\u003c\/p\u003e\n\u003cp\u003eFilters can be added inside the reducer.\u003c\/p\u003e\n\u003ch3\u003eTechnical Details:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesign: Corrector and reducer for refractor telescopes\u003c\/li\u003e\n\u003cli\u003eTelescopic connection: M63x1 external thread\u003c\/li\u003e\n\u003cli\u003eCamera connection: M48x0.75 external thread\u003c\/li\u003e\n\u003cli\u003eReduction factor: 0.8 x\u003c\/li\u003e\n\u003cli\u003eLenses: 3 lenses with ED element\u003c\/li\u003e\n\u003cli\u003eCoating: Multi-coating and internal blackening\u003c\/li\u003e\n\u003cli\u003eWorking distance: Variable (adjustable) Adjustment range of the distance :0-17 mm stepless\u003c\/li\u003e\n\u003cli\u003eSuitable for: Refractor telescopes from 102 mm to 155 mm aperture with focusers from 2.5\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45120145686747,"sku":"100025932","price":239.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/SF-FFRA-08-L-1_900.png?v=1711554125"},{"product_id":"starfield-2-herschel-solar-wedge","title":"Starfield 2\" Herschel Solar Wedge","description":"\u003cdiv\u003e\n\u003ch3\u003e2\" Herschel Solar Wedge\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Starfield Optics 2\" Herschel solar wedge transforms how you can observe the sun's surface including sun spots and surface detail\u003c\/p\u003e\n\u003cp\u003eThe solar wedge easily attaches to your refractor telescope, replacing the standard 2\" mirror or prism diagonal. The solar wedge is imaging-ready since you can fine tune the image brightness without needing to remove your camera.\u003c\/p\u003e\n\u003cp\u003eSolar wedges, compared to traditional film solar filters, are known to give you a higher-contrast image because it removes all reflections between the filter and telescope lens.\u003c\/p\u003e\n\u003cp\u003eThe sun can be safely observed with the Starfield Optics Herschel wedge. Brightness can be adjusted by twisting of the 2\" polarizing filter by rotating the 2\" eyepiece holder.\u003c\/p\u003e\n\u003cp\u003eGet ready to see sun spots and solar surface granulation like never before!\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45120145752283,"sku":"100025934","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/SF-Sol-Wedge-1_900.png?v=1711554865"},{"product_id":"starfield-32mm-guide-scope","title":"Starfield 32mm Guide scope","description":"\u003ch3\u003e32mm Guide Scope\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Starfield 30mm Guidescope is the perfect solution for ultra-portable imaging setups or Startacker mounts like the Skywatcher Star Adventure or iOptron Skyguider Pro. Compatible with guide scopes that are 1.25\" in diameter and with an M42 mount interface.\u003c\/p\u003e\n\u003cp\u003eThis CNC, made with hardened finish, displays the high build quality. 30mm f\/4, 120mm focal length. Adjustable 6 point rings with nylon tips to prevent damaging the finish. Mini-vixen style finder shoe.\u003c\/p\u003e\n\u003cp\u003eCompatible with most telescope finder shoes, including Starfield, Skywatcher, Celestron, Vixen, etc.\u003c\/p\u003e\n\u003ch3\u003eTechnical Details:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLens Diameter: 30 mm Focal Length: 120 mm\u003c\/li\u003e\n\u003cli\u003eCoated: FMC Support interface: 1.25in Or M42*0.75 mount Camera\u003c\/li\u003e\n\u003cli\u003eFocuser Type: Helical Front Focuser Tube Travel: 45 mm\u003c\/li\u003e\n\u003cli\u003eMaterial: Aluminum Net Weight: 342g \/ 0.75lb \/ 12.06oz\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45120146964699,"sku":"100025935","price":109.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/SFG-32-1_900.png?v=1711555819"},{"product_id":"starfield-50mm-guide-scope-gen-ii","title":"StarField 50mm Guide scope Gen II","description":"\u003cdiv\u003e\n\u003ch3\u003eStarField 50mm Guide scope Gen II\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eTotal Redesign from previous model. 50mm F4.1 205mm focal length guidescope with Helical Focuser. Fully multi-coated doublet Built-in Dew-shield, Rings and stalk. Accepts 1.25\" eyepieces \u0026amp; accessories High quality all-metal construction Fits Celestron, Skywatcher, Vixen \u0026amp; GSO type saddles. Internals are painted matt-black to reduce reflections and increase contrast.\u003c\/p\u003e\n\u003cp\u003eThe built-in dew-shield further reduces reflections and protects the guide-scope's optics from condensation.The non-rotating focuser assembly guarantees that the camera will not turn while focusing which in turn aids framing.\u003c\/p\u003e\n\u003cp\u003eThe 50mm guide scope with bright, wide-field optics puts numerous potential guide stars in view so you'll never have to search for one! 205mm Focal length f\/4.1.\u003c\/p\u003e\n\u003cp\u003eVery small and compact autoguiding system adds hardly any weight to an astrophotography setup and can conveniently be stashed in an accessory case between uses Heavy duty non-rotatiing helcial focuser with locking screws.\u003c\/p\u003e\n\u003cp\u003eFits standard Celestron, Skywatcher, Vixen and GSO type saddles. Includes Universal finder shoe.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45120147652827,"sku":"100025936","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/SFG-50-1_900.png?v=1711556729"},{"product_id":"starfield-60mm-guide-scope-gen-ii","title":"StarField 60mm Guide scope Gen II","description":"\u003cdiv\u003e\n\u003ch3\u003eStarField 60mm Guide scope Gen II\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eTotal redesign from previous model. 60mm F3.8 guide scope with Helical Focuser. Fully multi-coated doublet. Built-in dew-shield, rings and stalk. Accepts 1.25\" eyepieces and accessories. High quality all-metal construction.\u003c\/p\u003e\n\u003cp\u003eFits Celestron, Skywatcher, Vixen and GSO type saddles. Internals are painted matt-black to reduce reflections and increase contrast. The built-in dew-shield further reduces reflections and protects the guide-scope's optics from condensation.\u003c\/p\u003e\n\u003cp\u003eThe non-rotating focuser assembly guarantees that the camera will not turn while focusing which in turn aids framing. 60mm guide scope with bright, wide-field optics puts numerous potential guide stars in view so you'll never have to search for one!\u003c\/p\u003e\n\u003cp\u003e228mm Focal length. Very small and compact autoguiding system adds hardly any weight to an astrophotography setup and can conveniently be stashed in an accessory case between uses.\u003c\/p\u003e\n\u003cp\u003eHeavy duty non-rotatiing helical focuser with locking screws. Fits standard Celestron, Skywatcher, Vixen and GSO type saddles. Includes Universal finder shoe.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45120147751131,"sku":"100025937","price":170.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/SFG-60GII-1_900.png?v=1711557408"},{"product_id":"1-25-herschel-solar-wedge","title":"1.25\"  Herschel Solar Wedge","description":"\u003ch3\u003eStarfield 1.25\" Solar Wedge\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eEmbark on a captivating solar observing journey with the Starfield 1.25\" Solar Wedge. Designed for amateur astronomers and astrophotography enthusiasts, this high-quality solar wedge offers a unique window into the dynamic surface of the Sun.\u003c\/p\u003e\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVersatile Application: Perfect for both visual and photographic exploration of the Sun.\u003c\/li\u003e\n\u003cli\u003eSimple Setup: Easily attaches to refractor telescopes, replacing standard prisms or diagonals.\u003c\/li\u003e\n\u003cli\u003eSuperior Optical Quality: Anti-reflection coated prism ensures high-contrast, detailed solar views.\u003c\/li\u003e\n\u003cli\u003eIntegrated Filters: Adjustable CPL filter for safe, comfortable solar observation.\u003c\/li\u003e\n\u003cli\u003ePhotography-Ready: M42 threads facilitate straightforward camera attachment.\u003c\/li\u003e\n\u003cli\u003eOptimized Aperture: 26.5mm clear aperture for enhanced light capture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhile offering exceptional views, it's primarily suited for refractor telescopes up to 4\" and may not be compatible with all telescope models. For telescopes larger than 102mm \/ 4\" we recommend our 2\" Solar wedge model.\u003c\/p\u003e\n\u003ch3\u003eImportant Information:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe 1.25\" model is recommended for refractor telescopes up to 100mm aperture and the 2\" model for up to 150mm aperture. Only refractor telescopes are advised for use with a Herschel Wedge due to the intense heat and energy from the sun.\u003c\/li\u003e\n\u003cli\u003eThe wedge isn't suitable for Petzval or similar telescopes with a rear lens close to the focuser.\u003c\/li\u003e\n\u003cli\u003eTelescopes made with plastic components are not suitable for this wedge.\u003c\/li\u003e\n\u003cli\u003eDo not place a filter in front of a Herschel Wedge. Filters should only be mounted after the light has passed through the prism, as they can quickly overheat and get damaged.\u003c\/li\u003e\n\u003cli\u003eSolar observing can be hazardous. It's crucial to use proper equipment and follow safety guidelines provided with the products.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45257441476827,"sku":"100025933","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/Sol-Wedge-1-1_900.png?v=1712759281"},{"product_id":"focus-motor-for-sct-and-edgehd-1","title":"Astroasis Focuser w\/clutch","description":"\u003ch3\u003eAstroasis Focuser with Clutch\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eOasis Focuser is an electronic focuser with clutch mechanism, designed for astronomical observation and photography amateurs. It also has some other excellent features.\u003c\/p\u003e\n\u003cp\u003eThis product features the use of two gears instead of coupling as driving parts. One of the gears is installed on the shaft of the telescope focuser and the other is installed on the shaft of the motor. By holding the rear end of the Oasis Focuser and turning it, the two gears can be separated or meshed.\u003c\/p\u003e\n\u003cp\u003eThe clutch is self-locking. In most cases, as long as the Oasis Focuser is switched to the ON or OFF state, it can be kept in meshing or locking state without other operations. It is very convenient to use in this way. In addition, a locking screw is provided to ensure that the focuser will always be in a stable state when it needs to work in a certain state for a long period of time. For example, it can be used when the equipment works in a remote observation station and the focuser needs to be in an engaged state for an extended period of time.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eBluetooth control\u003c\/b\u003e — Users can use mobile devices such as mobile phone to connect Oasis Focuser via Bluetooth. Once connected, users can use mobile device to do operations such as focusing, firmware upgrading etc on Oasis Focuser.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSmall size and large driving ability\u003c\/b\u003e — Oasis focuser uses a small diameter and high reduction ratio stepper motor made by NPM motor company from Japan. It can drive a large load on the basis of having a delicate and compact appearance. Testing on a Sharpstar 107PH telescope indicates that this product is capable of steadily driving a net load of more than 5 kg.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHigh precision\u003c\/b\u003e — The higher reduction ratio means more steps and higher focusing resolution when do focusing. We did some tests and found that on the Starfield ED102 APO Pro it takes about 125 steps per 0.1mm focusing distance, while on the Sharpstar 107PH it takes about 159 steps per 0.1mm focusing distance. On both telescopes the focusing distance of each step is less than 1 micron.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSmall backlash\u003c\/b\u003e — The meshing and locking mechanism of the gears is designed carefully, and the two gears can mesh smoothly and perfectly to achieve the best meshing state. Backlash introduced by the gears is reduced effectively. The overall backlash of the product is very small. Under the same conditions, the backlash of the product is only about 1\/3 to 1\/5 of the comparison product.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eConvenient installation\u003c\/b\u003e — Oasis Focuser body can be installed to the telescope focuser by means of a clamp. Installation and removal of Oasis focuser body require only a single screw and can be done very quickly and easily. Oasis focuser can also be installed on a variety of telescoope focusers. A small step is designed on the clamp for auxiliary installation and positioning (as shown in the picture below). The installation position of the clamp can be easily determined by the step.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHighly integrated\u003c\/b\u003e — Except for the external ambient temperature sensor, other functional components including motor, control board and so on, are all in the Oasis focuser body. This makes it very easy to be installed and used. If you only use Bluetooth to control the focuser, you don't even need to use a USB cable to connect it to a computer or other device. You just need to connect 12V power to Oasis focuser.\u003c\/p\u003e\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eClutch function — Easy and fast switching between motor and manual focusing\u003c\/li\u003e\n\u003cli\u003eBluetooth function — Mobile devices such as mobile phones can be used to control the focuser via Bluetooth\u003c\/li\u003e\n\u003cli\u003eSmall size — Round appearance with small size\u003c\/li\u003e\n\u003cli\u003eHigh precision — Micron precision for each motor step\u003c\/li\u003e\n\u003cli\u003eAbility to drive heavy load — Testing indicates that it can driver net loads more than 5Kg\u003c\/li\u003e\n\u003cli\u003eSmall backlash — Carefully selected motor model and product design results in small backlash\u003c\/li\u003e\n\u003cli\u003eEasy to install — Easy to install or uninstall focuser body. Only one screw needs to be used to install or uninstall focuser body. And it can be installed on many telescope focusers\u003c\/li\u003e\n\u003cli\u003eHigh integrated — Except for the ambient temperature probe, all functions and components (including motor, controller board etc.) are implemented and integrated in the single small-sized focuser body\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdditional features:\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eSupports the ASCOM interface\u003c\/li\u003e\n\u003cli\u003eSupports the USB HID device interface, driver-free for Windows operation system.\u003c\/li\u003e\n\u003cli\u003eHas two temperature sensors; one monitors board temperature, the other monitors ambient temperature\u003c\/li\u003e\n\u003cli\u003eSupport for backlash compensation\u003c\/li\u003e\n\u003cli\u003eSupports electronic auto-focusing\u003c\/li\u003e\n\u003cli\u003eHas beep generator for tips or alarms\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhat's Included:\u003c\/h3\u003e\n\u003cp\u003e\u003cimg border=\"0\" width=\"900\" height=\"XXX\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/SF-AOF-B1_900.jpg?v=1712706170\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45257441542363,"sku":"100025965","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/SF-AOF-1_900.jpg?v=1712706255"},{"product_id":"140mm-bahtinov-mask","title":"140mm Bahtinov Mask","description":"\u003ch3\u003eBahtinov Mask for 140mm Optics\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Bahtinov mask is used to focus small telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov.\u003c\/p\u003e\n\u003cp\u003eSimply place the mask in front of the main optic of your telescope and take a picture. Look at the diffraction spike pattern and continue until the spikes are even. Using a Bahtinov mask is the easiest way to get into focus.\u003c\/p\u003e\n\u003ch3\u003eNotes:\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eThis 140mm mask is great for 125mm - 130mm class telescopes\u003c\/li\u003e\n\u003cli\u003eFits dew shields with an outside diameter of 153-192mm\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45276362211547,"sku":"100025971","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FM-140-1_1000.png?v=1713041798"},{"product_id":"gear-series-60mm-quad-f5-astrograph","title":"Gear series 60mm Quad F5 Astrograph","description":"\u003ch3\u003eGear series 60mm Quad f\/5 Astrograph\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Starfield 60mm quadruplet f\/5 Petzvel APO will take your wide field imaging game to new levels.\u003c\/p\u003e\n\u003cp\u003eThe development of the GÉAR60Q telescope placed a great emphasis on achieving very high standards in terms of its optical and mechanical quality. It features a built-in corrective element within the focusing tube, which is positioned at an optimized distance from the main objective. This design is specifically optimized for astrophotography, ensuring that the camera is automatically positioned at the correct distance for optimal sharpness across the entire field.\u003c\/p\u003e\n\u003cp\u003eThe telescope boasts 2-element lens with FPL53 as the APO element, resulting in exceptional color correction. Even bright stars are clearly visible without any color fringing. The 2-element corrector, built into the focus tube, ensures consistent sharpness across the entire field. Additionally, this apo is compatible with cameras featuring full-frame sensor with its 44mm image circle.\u003c\/p\u003e\n\u003cp\u003eThis 300mm Quad has the features that should be standard on all astrographs. A 2.5\" focuser with a camera angel adjuster, also known as a manual rotator, also boasts a tilt adjustment plate. Integrated handle for accessories and a long dovetail plate round out the package.\u003c\/p\u003e\n\u003cp\u003eMulticoated optics are standard and each Gear series telescope comes with a soft case with die cut foam. The case has been designed to accommodate the optional focusing motor, or a Pegasus Astro or ZWO focusing motor, and a spot for your imaging camera.\u003c\/p\u003e\n\u003cp\u003eThe Optional focusing motor can easily be disengaged to allow for manual focusing with a simple twist.\u003c\/p\u003e\n\u003cp\u003eThe Petzval design means that finding the perfect spacing is a thing of the past. Just focus your camera and take your images. The working distance is 41-61mm from the 48mm thread, and a 44mm image circle will illuminate a standard 36x24mm sensor.\u003c\/p\u003e\n\u003cp\u003eThe 2.5\" Rack and Pinion focuser boasts an exceptional standard of performance. The drawtube is securely supported by ball bearings, ensuring a smooth and stable operation. Providing exceptional accuracy and allows for the use of heavy cameras and accessories.\u003c\/p\u003e\n\u003cp\u003eThe focuser also offers a variety of convenient and useful features, including:\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA camera angle adjuster or Rotator with allows for 360° rotation.\u003c\/li\u003e\n\u003cli\u003eA precise tilter mechanism, which allows for adjustment to match the telescope to the camera for optimal performance.\u003c\/li\u003e\n\u003cli\u003eA 1:10 gear reduction for precise focusing.\u003c\/li\u003e\n\u003cli\u003eThe capability to connect a motor focus.\u003c\/li\u003e\n\u003cli\u003eAn integrated filter holder for 2\" filters which is placed in front of the camera.\u003c\/li\u003e\n\u003cli\u003eIntegrated handle for accessories and a long dovetail plate round out the package.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45276705652955,"sku":"100025966","price":1050.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/G60Q-05-01-1_900.jpg?v=1712937224"},{"product_id":"gear-series-90mm-ed-triplet-f6-apo-with-fpl53","title":"Gear series 90mm ED Triplet F6 APO with FPL53","description":"\u003cdiv\u003e\n\u003ch3\u003eGear series 90MM EDT F\/6\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Starfield EDT90 f\/6 Triplet APO with FPL53 will take your wide field imaging game to new levels. Using ED Glass optics, and GÉAR series standard accessories with heavy duty rings, vixen style dovetail, and a handle designed to mount accessories.\u003c\/p\u003e\n\u003cp\u003e2.5\" Rack and Pinion 2 speed focuser, and a retractable dew shield. To make your imaging experience even better the Camera Angle Rotator will let you frame up your object easily without adding flex or changing your focuser position.\u003c\/p\u003e\n\u003cp\u003eWith a total weight of 9 pounds, the Gear90 with it's optional 0.8x adjustable reducer, provides a larger field of view when using an APS-C based camera that is larger than 100mm class telescopes that cost more than double. When used visually magnification up to 300x with no chromatic abrasion.\u003c\/p\u003e\n\u003cp\u003eMulticoated optics are standard and each Gear series telescope comes with a Hard case with die cut foam, and optical test report.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45343482577115,"sku":"100025985","price":1720.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/G90-06EDT-1_900.png?v=1713365403"},{"product_id":"102mm-ed-f7-doublet-apo-with-fpl53","title":"102mm ED F7 Doublet APO with FPL53","description":"\u003ch3\u003eStarfield ED102 F\/7 APO Doublet with FPL53\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Starfield ED102 APO doublet offers incredible performance in both imaging a visual astronomy. Using FPL53 (Ohara, Japan) and a lanthanum element, chromatic correction rivals more expensive triplet telescopes with the advantage of faster cool down time. Taken to the highest magnification, images and views remain colour free. This fast refractor for lunar and solar system observation and demanding astrophotography applications.\u003c\/p\u003e\n\u003ch3\u003eHigh Quality Build and Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2.5\" two speed rack and pinion focuser, with ball bearings, that is also fully rotatable rotation. Optional Motor focusers can easily be installed. Self centering rotational lock. No setscrews to come loose. Support for heavy camera loads and accessories.\u003c\/li\u003e\n\u003cli\u003eSupports 2\" and 1.25\" eyepiece accessories\u003c\/li\u003e\n\u003cli\u003eHD CNC tube rings and Vixen style dovetail bar\u003c\/li\u003e\n\u003cli\u003eRetractable dew shield retractable for transport. With dew shield retracted the total length is 24”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDoublet APO 102mm F\/7 - FPL53 \/ Lanthanum Objective\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAperture 102 mm \/ focal length 714 mm \/ focal ratio f\/7\u003c\/li\u003e\n\u003cli\u003eAdjustable doublet in temperature compensated cell\u003c\/li\u003e\n\u003cli\u003eImage free of chromatic error due to \"Extra-Low-Dispersion\" FPL53 apo element from Ohara (Japan) and Lanthanum element. Achieving better chromatic correction than comparable apochromats with doublet lenses with lower quality glass.\u003c\/li\u003e\n\u003cli\u003eShorter cooling time than with triplet lenses, thus quicker operation possible\u003c\/li\u003e\n\u003cli\u003eInternally baffled to prevent stray light and get the contrast you would expect from performance refractors.\u003c\/li\u003e\n\u003cli\u003e2.5\" two speed rack and pinion focuser that is also fully rotatable rotation. Optional Motor focusers can easily be installed. Self centering rotational lock. No setscrews to come loose. Support for heavy camera loads and accessories.\u003c\/li\u003e\n\u003cli\u003eSupports 2\" and 1.25\" eyepiece accessories\u003c\/li\u003e\n\u003cli\u003eHD CNC tube rings and Vixen style dovetail bar\u003c\/li\u003e\n\u003cli\u003eRetractable dew shield retractable for transport. With dew shield retracted the total length is 26”\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45343482609883,"sku":"100025986","price":1135.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/S102-07-00-1_900.png?v=1713366133"},{"product_id":"80mm-ed-f7-doublet-apo-with-fpl53","title":"80mm ED F7 Doublet APO with FPL53","description":"\u003ch3\u003eStarfield ED80mm F\/7 APO Doublet Kit\u003c\/h3\u003e\n\u003ch3\u003eThe All new Starfield Optics ED80 APO doublet telescope package packs a punch!\u003c\/h3\u003e\n\u003cp\u003eThis telescope system can be used for visual applications and imaging. The complete package includes a 20mm wide angle eyepiece, 50mm right angle finder scope, 2\" diagonal, and a soft case with die cut foam to keep it all together for storage and transportation. Along with heavy duty rings, a vixen style dovetail bar, and rack and pinion 2 speed focuser this telescope is build for users of all levels.\u003c\/p\u003e\n\u003cp\u003eFor photographic use this telescopes offer two possible focal lengths. At f\/7 you get the full focal length of 560mm, and if the Starfield 0.8x reducer is added the new focal length of 448mm is achieved bring the focal ratio down to f\/5.6.\u003c\/p\u003e\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e80mm ED glass doublet\u003c\/li\u003e\n\u003cli\u003e560 mm focal length f\/7\u003c\/li\u003e\n\u003cli\u003eExcellent for visual observation or imaging when used with Starfield reducers or flatteners\u003c\/li\u003e\n\u003cli\u003eRetractable dew shield\u003c\/li\u003e\n\u003cli\u003eHeavy duty rings and V-style dovetail\u003c\/li\u003e\n\u003cli\u003e2\" 2-speed RP focuser\u003c\/li\u003e\n\u003cli\u003e50mm guide RA illuminated finder scope\u003c\/li\u003e\n\u003cli\u003e2\" Diagonal, 20mm WA eyepiece and soft carry case\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45343483298011,"sku":"100025987","price":950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/S80-07-00-1_900.png?v=1713366908"},{"product_id":"sightron-nano-tracker","title":"Sightron Nano Tracker","description":"\u003cdiv\u003e\n\u003ch3\u003eSightron NEW Nano Tracker\u003c\/h3\u003e\n\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe NEW Nano Tracker from Sightron is the successor to the original \"nano.tracker\", which has been very popular as a compact tracking device that can easily take starscape photos since its release 10 years ago. It now includes an external power port (USB-mini B type, cable sold separately) to the hand controller, which has been requested by many users. This makes it possible to drive from a USB power source as well as from 3 AA batteries.\u003c\/p\u003e\n\n\u003cp\u003eHave you ever seen a beautiful starry sky and thought, \"I wish I could capture this wonderful sight with my camera\" Nano Tracker is a starry sky tracking device that will help make that wish come true! Light weight at only 400g, simple to use, and easy to carry taking up very little room in your camera bag.\u003c\/p\u003e\n\n\u003ch3\u003eEasily Track the Stars, Moon, and Sun\u003c\/h3\u003e\n\u003cp\u003eThe stars, the moon, and the sun seem to move at the same speed, but in reality they move at slightly different speeds. The nano tracker has sidereal time tracking, moon tracking, and sun tracking modes, so you can choose the mode that best suits your shooting target. For example, select \"Sidereal Time Tracking Mode\" when shooting the Milky Way in the sky, \"Moon Tracking Mode\" when shooting the moon, and \"Sun Tracking Mode\" when shooting a solar eclipse.\u003c\/p\u003e\n\n\u003ch3\u003e0.5x Speed Mode Convenient for Nightscape Photography\u003c\/h3\u003e\n\u003cp\u003eRecently, \"Nightscape Astrophotography\", which takes pictures of the starry sky and the scenery on the ground together, has become popular. You can shoot in normal tracking mode, but the scenery on the ground will be blurred. The nano tracker is equipped with a 0.5x speed mode that tracks at half the normal tracking speed, and by halving the amount of blurring of the landscape on the ground, it is possible to take more natural nightscape photographs.\u003c\/p\u003e\n\n\u003ch3\u003eEasy Setting\u003c\/h3\u003e\n\u003cp\u003eThe Nano Tracker has a small \"Pole Star Peephole\", and you can adjust the orientation of the New Nano Tracker so that you can see the North Star in the center of the hole, and the setting is complete.\u003c\/p\u003e\n\n\u003cp\u003eEven beginners can easily set it up. The New Nano Tracker is designed to be used with wide-angle lenses. Exposures of 2 to 3 minutes can be attained.\u003c\/p\u003e\n\n\u003ch3\u003eLightweight and Compact\u003c\/h3\u003e\n\u003cp\u003eWeighing in at a whopping 400g it is large enough to fit in one hand, so you can easily bring it with you when climbing a mountain or traveling abroad.\u003c\/p\u003e\n\n\u003cp\u003eThe nano tracker can also be used in the Southern Hemisphere. \u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45343483363547,"sku":"100025988","price":310.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/Nano-Tracker-1_900.png?v=1713367949"},{"product_id":"ultra-thin-motorized-filter-wheel-5x1-25-filters-high-speed","title":"Ultra Thin Motorized Filter Wheel 5x1.25\" Filters, High Speed","description":"\u003ch3\u003eStarfield Ultra Thin Motorized Filter Wheel - 5 x 1.25\" Filters - V4 High Speed\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eNew High Speed Edition 5-Position Filter Wheel\u003c\/p\u003e\n\u003cp\u003eNewly updated to achieve carousel rotation speeds more than 5 times faster than the FW5125V4.\u003c\/p\u003e\n\u003cp\u003eSTILL THE SMALLEST AND LIGHTEST FILTER WHEEL IN THE WORLD (Despite the competition's claims).\u003c\/p\u003e\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUltra slim motorized filter wheel - only 248g and 19mm thick! USB controlled (ASCOM driver) and powered (no additional power supply required).\u003c\/li\u003e\n\u003cli\u003eNo motors protruding from the filter wheel to get in the way.\u003c\/li\u003e\n\u003cli\u003eMeasuring only 4.5\" x 4.75\" x 0.7\", this is one of the smallest, thinnest motorized filter wheels on the market.\u003c\/li\u003e\n\u003cli\u003eOnly adds 19mm of back focus to the optical path when used with our adapters.\u003c\/li\u003e\n\u003cli\u003ePerfect solution for Basler Ace, ZWO ASI, QHY ATIK, Moravian. SBIG cameras, and more.\u003c\/li\u003e\n\u003cli\u003eThe filter carousel is 5 threaded for M28.5 x 0.6 filters.\u003c\/li\u003e\n\u003cli\u003eThe maximum filter cell height which can be accommodated is 11mm, having thread length of no more than 4mm.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIncludes:\u003c\/h3\u003e\n\u003cp\u003e(1) T thread to T thread adapter\u003cbr\u003e(1) T thread to C thread adapter\u003cbr\u003e(1) T thread to 1.25\" barrel adapter\u003cbr\u003e(1) 10 ft and 1 ft USB interface cable set\u003cbr\u003e\u003c\/p\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45343483461851,"sku":"100025989","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FW5125V4HS-1_900.png?v=1713369157"},{"product_id":"filter-carousel-for-5x2-filter-wheel-m48-x-0-75","title":"Filter Carousel For 5x2\" Filter Wheel M48 x 0.75","description":"\u003cdiv\u003e\n\u003ch3\u003eFilter Carousel for 2\" FW5200V2 Filter Wheel - M48 x 0.75\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eReplacement carousel for our 2\" FW5200V2 motorized filter wheel.\u003c\/p\u003e\n\u003cp\u003eConvenient as an additional carousel for doing false colour imaging - change the entire carousel instead of removing the filter set.\u003c\/p\u003e\n\u003cp\u003eThreaded for M48 x 0.75 filters.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45343484215515,"sku":"100025990","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FW5200V2CAR-1_900.png?v=1713369569"},{"product_id":"4-channel-4-output-dew-controller","title":"4 Channel 4 output Dew Controller","description":"\u003cdiv\u003e\n\u003ch3\u003eStarfield SF-DC4 Dew Controller\u003c\/h3\u003e\n\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThis latest version has a seperate power input socket and a seperate power cable.  Power your dew control from your own power source.\u003c\/p\u003e\n\n\u003cp\u003eThis sensibly priced four-channel controller allows you to connect and control output to four individual heater strips (not included). Most heater strips from all the major manufacturers are supported via standard RCA phono type sockets. Total power output up to 8 amps. You will need to ensure that your power supply can deliver enough power for your requirements keeping in mind other equipment such as your mount and cameras also require power. Each output can be set independently to the required output level.\u003c\/p\u003e\n\n\u003cp\u003eA 2 meter long cigarette-lighter type cable with a 10 amp fuse is included.\u003c\/p\u003e\n \n\u003cp\u003eIncludes 2 independent 2.1mm power outputs to power accessories and some mounts. \u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45343484281051,"sku":"100025991","price":115.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/SF-DC4a-1_900.png?v=1713370284"},{"product_id":"adjustable1-0x-flattener-for-70mm-155mm-telescopes","title":"Adjustable1.0x Flattener for 70mm-155mm telescopes","description":"\u003ch3\u003eAdjustable Flattener for 80 - 155mm Telescope\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Starfield 1.0x adjustable flattener makes finding the correct back focus easy! Fighting with adapters is a thing of the past!\u003c\/p\u003e\n\u003cp\u003eBy setting the adjustment required for your telescope, achieving the correct amount of back focus is simple. If more adjustment is needed for fine tuning all that is needed is a small twist. If you are using accessories such as filter wheels and rotators you can not still get the required back focus. Just add up the thickness of all the accessories, plus the distance to your sensor and subtract from 69.87 and then set the reducer to the number that is calculated.\u003c\/p\u003e\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe reducer attaches directly to the Starfield telescope focusers.\u003c\/li\u003e\n\u003cli\u003eUsing the supplied 1.5mm Allen key, loosen off the three screws a half turn and then unscrew the lock.\u003c\/li\u003e\n\u003cli\u003eThread the reducer onto the focuser.\u003c\/li\u003e\n\u003cli\u003eThis Flattener is designed for telescopes ranging from 80mm to 155mm.\u003c\/li\u003e\n\u003cli\u003eFilters can be added inside the reducer.\u003c\/li\u003e\n\u003cli\u003e80 mm \/ focal ratio f\/6 - 81.2 mm\u003c\/li\u003e\n\u003cli\u003e90mm \/ focal ratio f\/6 - 82.5mm\u003c\/li\u003e\n\u003cli\u003e102 mm \/ focal ratio f\/7 - 75.3 mm\u003c\/li\u003e\n\u003cli\u003e115 mm \/ focal ratio f\/7 - 73.0 mm\u003c\/li\u003e\n\u003cli\u003e130 mm \/ focal ratio f\/7 - 69.7 mm\u003c\/li\u003e\n\u003cli\u003e140 mm \/ focal ratio f\/6.5 - 68.0 mm\u003c\/li\u003e\n\u003cli\u003e155 mm \/ focal ratio f\/8 - 57.0 mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45343484313819,"sku":"100025992","price":239.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/SF-FFA-10-1_900.png?v=1713371003"},{"product_id":"60mm-bahtinov-mask","title":"60mm Bahtinov Mask","description":"\u003cmain\u003e\n\u003ch3\u003eBahtinov Mask for 60mm Optics\u003c\/h3\u003e\n\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Bahtinov mask is used to focus small telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov.\u003c\/p\u003e\n\n\u003cp\u003eSimply place the mask in front of the main optic of your telescope and take a picture. Look at the diffraction spike pattern and continue until the spikes are even. Using a Bahtinov mask is the easiest way to get into focus.\u003c\/p\u003e\n\n\u003ch3\u003eNotes:\u003c\/h3\u003e\n\u003cp\u003eThis 60mm mask is great for 67mm - 87mm class telescopes\u003c\/p\u003e \n\n\u003c\/main\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45413080695003,"sku":"100025967","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FM-60-1.jpg?v=1731337605"},{"product_id":"80mm-bahtinov-mask","title":"80mm Bahtinov Mask","description":"\u003ch3\u003eBahtinov Mask for 80mm Optics\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Bahtinov mask is used to focus small telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov.\u003c\/p\u003e\n\u003cp\u003eSimply place the mask in front of the main optic of your telescope and take a picture. Look at the diffraction spike pattern and continue until the spikes are even. Using a Bahtinov mask is the easiest way to get into focus.\u003c\/p\u003e\n\u003ch3\u003eNotes:\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eThis 80mm mask is great for small telescopes\u003c\/li\u003e\n\u003cli\u003eFits dew shields with an outside diameter of 87-105mm\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45413081481435,"sku":"100025968","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FM-140-1_1000_ab445555-2a24-4bb5-8adf-a007897e79ca.png?v=1714229792"},{"product_id":"100mm-bahtinov-mask","title":"100mm Bahtinov Mask","description":"\u003ch3\u003eBahtinov Mask for 100mm Optics\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Bahtinov mask is used to focus small telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov.\u003c\/p\u003e\n\u003cp\u003eSimply place the mask in front of the main optic of your telescope and take a picture. Look at the diffraction spike pattern and continue until the spikes are even. Using a Bahtinov mask is the easiest way to get into focus.\u003c\/p\u003e\n\u003ch3\u003eNotes:\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eThis 100mm mask is great for 90-105mm class telescopes\u003c\/li\u003e\n\u003cli\u003eFits dew shields with an outside diameter of 109-145mm\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45413083119835,"sku":"100025969","price":28.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FM-140-1_1000_9a82d55b-6855-47cc-b81e-a5320f1de762.png?v=1714230093"},{"product_id":"120mm-bahtinov-mask","title":"120mm Bahtinov Mask","description":"\u003ch3\u003eBahtinov Mask for 120mm Optics\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Bahtinov mask is used to focus small telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov.\u003c\/p\u003e\n\u003cp\u003eSimply place the mask in front of the main optic of your telescope and take a picture. Look at the diffraction spike pattern and continue until the spikes are even. Using a Bahtinov mask is the easiest way to get into focus.\u003c\/p\u003e\n\u003ch3\u003eNotes:\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eThis 120mm mask is great for 105-125mm class telescopes\u003c\/li\u003e\n\u003cli\u003eFits dew shields with an outside diameter of 120-152mm\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45413083709659,"sku":"100025970","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FM-140-1_1000_3ba96251-2b8a-46dd-96c7-eb95e7a3e422.png?v=1714230339"},{"product_id":"160mm-bahtinov-mask","title":"160mm Bahtinov Mask","description":"\u003ch3\u003eBahtinov Mask for 160mm Optics\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Bahtinov mask is used to focus small telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov.\u003c\/p\u003e\n\u003cp\u003eSimply place the mask in front of the main optic of your telescope and take a picture. Look at the diffraction spike pattern and continue until the spikes are even. Using a Bahtinov mask is the easiest way to get into focus.\u003c\/p\u003e\n\u003ch3\u003eNotes:\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eThis 160mm mask is great for 140-150mm class telescopes\u003c\/li\u003e\n\u003cli\u003eFits dew shields with an outside diameter of 175-212mm\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45413085053147,"sku":"100025972","price":42.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FM-140-1_1000_1877d599-fc66-4d5e-a813-47234f5757b3.png?v=1714230569"},{"product_id":"180mm-bahtinov-mask","title":"180mm Bahtinov Mask","description":"\u003ch3\u003eBahtinov Mask for 180mm Optics\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Bahtinov mask is used to focus small telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov.\u003c\/p\u003e\n\u003cp\u003eSimply place the mask in front of the main optic of your telescope and take a picture. Look at the diffraction spike pattern and continue until the spikes are even. Using a Bahtinov mask is the easiest way to get into focus.\u003c\/p\u003e\n\u003ch3\u003eNotes:\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eThis 180mm mask is great for 150-165mm class telescopes\u003c\/li\u003e\n\u003cli\u003eFits dew shields with an outside diameter of 185-210mm\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45413085610203,"sku":"100025973","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FM-140-1_1000_b94dfa4d-45a5-42d1-b1f3-7323e5ecb2ab.png?v=1714230816"},{"product_id":"200mm-bahtinov-mask","title":"200mm Bahtinov Mask","description":"\u003ch3\u003eBahtinov Mask for 200mm Optics\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Bahtinov mask is used to focus small telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov.\u003c\/p\u003e\n\u003cp\u003eSimply place the mask in front of the main optic of your telescope and take a picture. Look at the diffraction spike pattern and continue until the spikes are even. Using a Bahtinov mask is the easiest way to get into focus.\u003c\/p\u003e\n\u003ch3\u003eNotes:\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eThis 200mm mask is great for 8\" SCT or RC telescopes\u003c\/li\u003e\n\u003cli\u003eFits dew shields with an outside diameter of 212-252mm\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45413086757083,"sku":"100025974","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FM-140-1_1000_ac449a04-920b-4854-bc02-7b8d838b2496.png?v=1714231053"},{"product_id":"rasa-8-bahtinov-mask-with-center-cutout","title":"RASA 8 Bahtinov Mask  with center cutout","description":"\u003cdiv\u003e\n\u003ch3\u003eBahtinov Focus Mask for Celestron 8\" RASA Telescope\u003c\/h3\u003e\n\u003ch3\u003eOverview:\u003c\/h3\u003e\n\u003cp\u003eThe Bahtinov Mask – For the Celestron RASA 8″ telescope, is an ingenious new way to easily focus a telescope. Pavel Bahtinov, a Russian amateur telescope maker and astronomer, created this simple, very intuitive method and the device has universally been named after him: The Bahtinov Mask.\u003c\/p\u003e\n\u003cp\u003eAttach a camera to the telescope, center a fairly bright star and achieve rough focus. Then place the mask over the front aperture of your telescope by “hanging” it on the plastic screws from the front dew shield. Take a short exposure. The image of the star will show diffraction spikes. The “center” set will most likely be shifted to one side or the other. This is showing the defocus.\u003c\/p\u003e\n\u003cp\u003eAdjust the focus of the telescope and re-expose the star, once again showing the diffraction spike pattern. Iterate the process until the central diffraction spike is centered against the star and the other spikes. When a symmetrical pattern is achieved, the best possible focus is then reached. Simply remove the mask, center the target object and take amazing, sharp images!\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Starfield Optics","offers":[{"title":"Default Title","offer_id":45413087281371,"sku":"100025975","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0424\/5104\/2453\/files\/FM-RASA8-1_900.jpg?v=1714237186"}],"url":"https:\/\/www.atlantahobby.com\/collections\/starfield-optics\/2.oembed","provider":"Atlanta Hobby","version":"1.0","type":"link"}