This Bahtinov Focus Mask from Starfield provides an easy way to focus on the deep sky. Simply place it over the aperture of your telescope and focus on a bright star in the dark sky. When the image your camera captures shows even diffraction spikes with a neatly bisected X, the deep-sky objects in your view are in perfect focus.
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Key Features
- Easy Way to Get in Focus
- Fits Over Telescope's Aperture
This Bahtinov Focus Mask from Starfield provides an easy way to focus on the deep sky. Simply place it over the aperture of your telescope and focus on a bright star in the dark sky. When the image your camera captures shows even diffraction spikes with a neatly bisected X, the deep-sky objects in your view are in perfect focus.
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Starfield FM-60 Overview
Starfield FM-60 Specs
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Starfield FM-60 Reviews
Tried it on a DSLR
By Hans
Rated 5 out of 5
Date: 2025-08-29
This item is probably meant for a telescope, not for a DSLR, but I tried it anyway. Even though it didn't work quite as expected I'm giving a 5 star rating, since I used it in a way that wasn't intended. It fit my tele lens that has a 67mm filter thread. For my 50mm lens (77 mm filter thread), the provided holders weren't wide enough, so I just used a piece of gaffer tape to attach the filter. I couldn't see the diffraction pattern when focusing, neither through the optical finder nor in live view, but the focus mask was still somewhat helpful for focusing. I did, however, see the pattern when taking a test picture with my tele lens. So, making small adjustments and taking several test pictures was a method I could use, see the attached pictures (taken with the mask still attached).
See any errors on this page?
Will this fit a DSLR lens with a filter thread of ...
Will this fit a DSLR lens with a filter thread of 77 mm? The outer diameter of the lens barrel is around 80 mm.
The Starfield Bahtinov Focus Mask (60mm) is not compatible with a 77mm photo lens.
Date published: 2025-08-29