This customizable design generates custom Bahtinov masks, which are used to aid focusing telescopes during astrophotography. They are named after Paul. Bahtinov mask generator 3D models available on Trying to go to David (Farmer Dave)’s famous mask generator at is currently resulting in a DNS error. I’ve tried contacting David.

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Continued use of SGL indicates your acceptance of our cookie policy. Angled slot offset Sripe offset must be an integer. You might want to adjust downwards to avoid generating tiny cutouts at the very top and bottom of the right-hand quadrants. Has no effect if the central obstruction diameter is 0.

However, trying to do bahtiniv with a DSLR is extremely difficult as the pentaprism viewfinder is designed for daytime use and even a ‘bright’ star appears dim in the viewfinder. A “doughnut” is cut out of the central obstruction to fit over your secondary holder when checked.

Complete cutouts in plastic.

Bahtinov Focusing Mask Generator Overview A Bahtinov mask is a focusing aid for astronomy in general, and astrophotography in particular. Let Them Know Message sent!

Bahtinov Mask Generator – Anyone made a working one? Astro-CCDs have to be connected to a PC to work and the capture software can often be used to help with achieving focus by allowing you to view the captured images at high resolution on the monitor so that you can evaluate the quality of the focus. If you plan to open the generated SVG with Illustrator, check this box – if you forget, you can always scale the drawing by 0.


I have generated printable PDF templates for the most popular telescope apertures using the original bahtinov mask generator from “Astrojargon” website. The size of this default mask means that a large 3d printer must print this.

By using this site, you agree to the Terms of Use and Privacy Policy. The diffraction effect is similar to producing sunstar patterns in landscape photography with ordinary camera lenses, where the mechanical iris of the lens is adjusted to a small polygonal shape with sharp corners.

What will I see in a Telescope. Once the spikes are crossed, remove the mask and observe in focus. This astronomy-related article is a stub. The one I made was cut from thin cardboard, like postcard thickness. You might want to adjust downwards to avoid generating tiny cutouts at the very top and bottom of the left-hand side. The mask consists of three separate grids, positioned in such a way that the grids produce three angled diffraction spikes at the focal plane of the instrument for each bright image element.

Bahtinov mask generator 3D models

Top margin must be a non-negative number. Mac 40D Shutter Count.

Advanced parameters Tweak the settings to experiment, to adjust for differences in materials, or nahtinov for fun. However, the unique design of the Bahtinov Mask produces a very bright image with a diffraction pattern forming a long cross comprised of two intersecting lines and a third line that moves across the centre of the cross as the telescope is adjusted in and out of focus.


Small deviations from generatod focus are easily visible. Points for a mounting ring.

Bahtinov mask – Wikipedia

Show Some Love – Tip brentb. Already have an account? I found that it sort of worked, but the diffraction pattern wasn’t really like the example images seen in tutorials on how to use the masks. Summary This customizable design generates custom Bahtinov masks, which are used bahttinov aid focusing telescopes during astrophotography.

Bahtinov mask

Angled slot count Sripe count must be a positive integer. Central obstruction diameter must be a non-negative number. Unless you feel strongly about it, leave this uchecked.

The Bahtinov mask is a device used to focus small astronomical telescopes accurately. Down generatot almost an hour of frustration to a few minutes now to get it spot on. I glued the strips bxhtinov the bent sections using a strong contact glue. Give a Shout Out If you print this Thing and display it in public proudly give attribution by printing and displaying this tag. I used the templates here: Posted December 18,