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

Best bahtinov mask I own!

Brian J.

Johannes's masks are the best. No more cutting out cardboard and chasing them down in the wind.

Sam L.

I wish I'd used a mask sooner. This makes everything so much easier. 

Sarah H.

The bahtinov mask cut my set up time in half! It's so much easier than focusing manually.

Aaron T.