Deep Sky Astrophotography - Using and Making Bahtinov Masks

Resources

To 3D print your own Bahtinov mask for accurate manual focusing, I suggest starting with AstroJargon's incredibly useful Bahtinov Mask Generator, which will generate a SVG file, you can then import that SVG file in to tinkercad, add a collar, and download as an STL file for 3D printing. For 3D printing, either find a 3D printer at your local library or university, or if you can't find anything locally you can use 3d Hubs to shop around for the best price. Here is an example of a Bahtinov mask I made for a Skywatcher 80mm doublet refractor: