Universal Bahtinov Focus Mask – Sharp Telescope Focus

Nail telescope focus in seconds with this universal Bahtinov mask. The bright diffraction pattern eliminates guesswork — align the central spike and your focus is locked. Available in 60–180mm sizes, 3D printed in weather-resistant PETG to fit most refractors and SCTs.

It's the simplest way to get consistently sharp results for astrophotography and visual observing.

• Fast, Repeatable Focus: Stop guessing and lock in perfect focus every time.
• Glove-Friendly Design: Easy to handle, even on cold nights.
• Durable & Weather-Resistant: 3D-printed in rugged PETG plastic that resists cold and dew without warping.
• Secure Fit: Integrated slots let you use a strap (not included) to prevent it from falling off your scope.

Specifications:

How to Choose Your Size: Measure the outer diameter (OD) of your telescope's front end or dew shield. Select the closest size for your refractor or SCT.

• Available Sizes (OD): 60mm, 80 mm, 100 mm, 120 mm, 140 mm, 160mm, 180mm
• Material: PETG Plastic
• Color Options: Black (Default), White, Grey.
• Origin: 3D-printed to order. Ships from Canada. CUSMA compliant for tariff free shipping to the U.S