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GeorgeFC
member
Reged: 03/27/09
Posts: 15
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Re: A new focussing mask
07/04/09 12:01 PM
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Hi Lawrie. Yes, I came to the same conclusion when figuring out how the Bahtinov mask works. Have a look at http://www.btinternet.com/~gfcarey/bahtinov.htm
and scroll down a little to see my 'Y' diffraction pattern. The Y mask would indeed work, but of course the Bahtinov with many parallel slits produces a much brighter diffraction pattern.
After I had figured out the Bahtinov I realised that my 6" reflector has a built in mask due to it having 3 spider vanes!
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