Hi, I have used files from this site to make several small Bahtinov masks for my smaller scopes and they work great. http://astrojargon.n...ookieSupport=1
I just make them from stiff card and have a moderate life cycle. I want to make a mask for my 14" Newt, just to perfect focus when I'm doing a bit of afocal Lunar imaging. I was thinking in the first case, it would be much easier to make a smaller mask that would fit over an aperture mask (which I also haven't made) rather than a mask for the full aperture. Will it work?