180mm Bahtinov Mask
$45.00
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180mm Bahtinov Mask
$45.00
Pinpoint Focus
Achieve perfect stellar focus
Diffraction Pattern
Visual spike focusing aid
Custom Fit
Fits 185 to 210mm shields
In Stock
Perfect Stellar FocusMaster Astrophotography Focus Instantly
Achieve razor-sharp focus for astrophotography with the Bahtinov Mask for 180mm Optics. Designed to produce clear diffraction spike patterns, this telescope focusing mask eliminates frustrating guesswork so you can capture crisp, detailed celestial images every session.
Precision Focus ToolEssential Accessory for Astrophotographers
Named after Russian amateur astrophotographer Pavel Bahtinov, the Bahtinov Mask for 180mm Optics is an indispensable optical aid for deep-sky imaging and planetary observation. Simply place the mask over the main optic or dew shield of your setup, point at a bright target star, and take a quick test exposure. By adjusting your telescope focuser until the central diffraction spike bisects the angled symmetry pattern, you guarantee critical focus across your field. Designed specifically to compliment 150-165mm class telescopes, this high-precision astrophotography focus tool securely fits dew shields with an outside diameter of 185mm to 210mm, making setup rapid and reliable.
Technical SpecificationsSizing and Fitment Details
Product Name
Bahtinov Mask for 180mm Optics
Compatible Telescope Class
150-165mm Optics
Dew Shield Outer Diameter Fit
185mm - 210mm
Primary Function
Precision Focus Diffraction Aid
Pattern Type
Pavel Bahtinov Grid
Application
Astrophotography & Visual Astronomy
Key Design FeaturesPerformance Highlights for Stargazers
Intuitive AlignmentGenerates distinct diffraction spikes for instant visual confirmation
Optimal CompatibilityEngineered specifically for 150-165mm class telescope optics
Flexible Shield FitMounts securely onto dew shields with 185mm to 210mm outer diameters
Proven Slot DesignUtilizes Pavel Bahtinov's renowned three-grid diffraction geometry
Field DurableLightweight construction resists dew and is easy to store in gear bags
Foolproof SetupPerfect focus tool for both beginner and expert astrophotographers
Frequently Asked QuestionsEverything you need to know
How does the Bahtinov Mask for 180mm Optics work?
The Bahtinov Mask for 180mm Optics uses a specialized angled grid pattern to split incoming star light into distinct diffraction spikes. When the central spike is aligned directly down the middle of the diagonal spikes, your telescope is in perfect focus.
What telescope sizes fit the Bahtinov Mask for 180mm Optics?
The Bahtinov Mask for 180mm Optics is designed for 150-165mm class telescopes and fits dew shields with an outside diameter ranging between 185mm and 210mm.
Do I leave the Bahtinov Mask for 180mm Optics attached while taking pictures?
No, you only keep the Bahtinov Mask for 180mm Optics on the front of your telescope while focusing on a test star. Once focus is locked, remove the mask before capturing long-exposure astrophotography targets.