This Bahtinov Mask fits any camera lens with a filter thread - just choose the appropriate size. It clips on like a lens cap, making it easy and convenient to use without needing a separate UV filter to screw on and off.
Each mask is 3D-printed from durable, environmentally-friendly PLA plastic, and is coloured white for easy handling in the dark.
For some lenses where the filter thread moves with the focus mechanism, our loose-fitting masks may be more suitable to avoid disturbing the focus when the mask is removed.
Also please note that Bahtinov masks in general are less effective at short focal lengths; 100mm is generally considered the limit.
All sizes are universal for that filter size, with one exception: if you have a Sigma 150-600mm F5-6.3 DG OS HSM (Contemporary) lens, you will notice there is a specific 95mm pinch fit mask for this.
Clip-on Bahtinov Mask for Camera Lenses - Filter thread fit
In the unlikely event you are unhappy with your mask, or you change your mind or ordered the wrong size, it can be returned for a refund or replacement within 30 days.
Bahtinov masks have been an astrophotography essential for telescopes since their invention by Pavel Bahtinov in 2005. These masks extend their use to DSLR cameras, where they also excel at medium-to-long focal lengths.
It can take a little more work, however; sometimes you can use the live view display on your camera, whereas other times you may need to take an exposure to discern the diffraction pattern.
For more information, consult this excellent guide: https://astrobackyard.com/bahtinov-mask/
These masks are a unique clip-on type; they grip onto the filter threads like a lens cap, holding them on securely without being fiddly to use in the cold and dark. Just squeeze the tabs on the sides as you would with a lens cap.