Infinite Focus for Astrophotography

Developed in 2005 by the Russian amateur astronomer Pavel Bahtinov, the bahtinov focus mask works by diffracting incoming light into a predictable and recognizable pattern which you can then use as a guide to perfect infinity focus. With the mask attached, you'll be able focus to infinity within seconds, saving you set up time for nighttime photography.

How to use a Bahtinov Mask

Get the right focus for your set up

Bahtinov Focus Tools for DSLRs

Highest Precision Bahtinov Masks

Biggest Bahtinov Masks

Solar Filter - Sun Viewing

Easily attach and remove without moving the scope

Adjust focus until the diffraction spike is centered