Clip in Bahtinov Mask 58mm Filter fits Sigma 70-300

thingiverse

I made some Bahtinov Masks for different lenses and telescopes. This one fits in 58mm filter thread. The layers help for good grip. You can print the little handle upside down, so you don't need any supports. Without handle it's not as easy to remove the mask from the lens and you likely will destroy your focussing while trying to peel it out the Thread. The handle is just glued to it.