Celestron 1.25" 18mm 65 Degree Ultima Edge Eyepiece (93452)
$169.99
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Celestron 1.25" 18mm 65 Degree Ultima Edge Eyepiece (93452)
$169.99
Flat-Field Optics
Crisp views edge to edge
65° Wide Field
Expansive night sky observations
8-Element Design
Fully multi-coated glass system
20mm Eye Relief
Comfortable for all eyeglass wearers
1.25 Inch Barrel
Fits standard diagonals and focusers
Parfocal Build
Seamless eyepiece swap without refocusing
Explore Deep Space DetailSuperior flat field optical clarity
The Ultima Edge 18mm Eyepiece delivers ultra-sharp, flat-field astronomical performance designed to reveal intricate detail across the lunar surface and planetary targets. Featuring premium fully multi-coated 8-element optics, this telescope eyepiece maximizes light transmission for pristine image contrast. Its versatile 1.25" barrel design seamlessly enhances any standard stargazing telescope setup.
Uncompromising Astronomical ClarityEngineered for demanding amateur astronomers
Designed for demanding observers, the Ultima Edge 18mm Eyepiece eliminates field curvature to ensure point-source star clarity from the center all the way to the edge of your field of view. Built with a machined high-grade aluminum housing and black anodized finish, this 1.25" telescope eyepiece features a non-slip molded rubber grip ring for secure handling during night observing sessions. With a generous 20mm eye relief and fold-down rubber eyecup, visual observation remains effortless for spectacle wearers. The parfocal design allows quick swaps between Ultima Edge series eyepieces without tedious refocusing, making it an indispensable optical upgrade for higher-powered planetary and lunar telescope observation.
Technical SpecificationsDetailed metrics and optical parameters
Focal Length
18mm (.71") (lens)
Barrel Size Diameter
1.25" (31.75mm) (disc)
Apparent Field of View
65°
Optical Design
Proprietary Flat-Field
Number of Lens Elements
8
Number of Lens Groups
5
Optical Coatings
Fully Multi-Coated
Eye Relief
20mm (.78") (user)
Field Stop Diameter
23.4mm (.93") (circle)
Parfocal
Yes
Filter Threads
1.25" (M28.5X0.6) (disc)
Eye Guard
Yes - Roll up rubber
Body Material
High-Grade Aluminum
Weight
7.4 oz (209.7 g) (scale)
Dimensions
81mm x 51mm x 51mm (3.19" x 2" x 2") (ruler)
Stellar Optical FeaturesEngineered for superior night observations
Flat-Field OpticsProvides sharp edge-to-edge images without field curvature
8-Element Lens DesignMaximizes light transmission and image sharpness
Fully Multi-CoatedAnti-reflective optical coatings deliver superior visual contrast
65 Degree Apparent FOVOffers an expansive perspective on stars and lunar terrain
20mm Long Eye ReliefExceptional viewing comfort with or without eyeglasses
Parfocal CompatibilitySwitch between Ultima Edge eyepieces without adjusting focus
High-Grade Aluminum BodyDurable anodized finish with tactile rubber grip ring
Threaded BarrelInternally threaded for standard 1.25 inch telescope filters
Frequently Asked QuestionsEverything you need to know
Is the Ultima Edge 18mm Eyepiece suitable for eyeglass wearers?
Yes, the Ultima Edge 18mm Eyepiece features a generous 20mm eye relief along with a fold-down rubber eyeguard, allowing eyeglass wearers to comfortably view the full field of view without removing their glasses.
Will the Ultima Edge 18mm Eyepiece fit my telescope?
The Ultima Edge 18mm Eyepiece features a standard 1.25" barrel size, making it compatible with any telescope fitted with a 1.25" star diagonal or focuser.
Can I attach filters to the Ultima Edge 18mm Eyepiece?
Yes, the 1.25" mounting barrel of the Ultima Edge 18mm Eyepiece is internally threaded (M28.5x0.6) to accept standard 1.25" astronomy filters.
What does the parfocal feature mean on the Ultima Edge 18mm Eyepiece?
The parfocal design means that when you switch between different focal length eyepieces within the Ultima Edge line, you do not need to adjust your telescope's focus knob.
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