Three-Pattern Bahtinov Focusing Mask for Telescopes, Aluminum Alloy Build Fits 63 to 89mm Outer Diameter, Fast Focus Diffraction Aid for Reflectors Refractors Dobsonians Mak Cas, Spot-On Focus Confirmation for Crisp Night Sky Shots
✔️ Aluminum alloy, 1mm thick, fits 63-89mm OD, single unit
The Bahtinov focusing mask is a precision diffraction tool designed to help you lock in perfect focus for telescope imaging. This handy accessory is widely used during night sky observing and astrophotography with reflectors, refractors, Dobsonians, Mak-Cass tubes, and other scopes in the 63-89mm outer diameter range.
✅ Pattern creates three distinct diffraction spikes that converge at focus for instant confirmation
✅ 1mm thick aluminum alloy keeps it light yet durable
✅ Universal fit for 63-89mm outer diameter tubes with a secure center
✅ Tripod-style clamp with rubberized tips prevents slippage and protects the aperture
✅ Scratch-resistant finish and reinforced edges endure regular use
💡 What is a Bahtinov focusing mask used for in telescope imaging?
This handy tool helps you nail focus quickly by showing a diffraction pattern that aligns with the focal point.
- Precise focus confirmation for crisp night sky shots - Works with 63-89mm outer diameter tubes across reflectors, refractors, dobs, mak-cass - Lightweight 1mm aluminum alloy construction for field use - Reduces guesswork during focusing for consistent results✝️