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Hi Carl
I have sized and cut out on stiff cardboard the attached Bahnitov mask.
I was previously using one that had much coarser cutouts but I find that the new one with finer cutouts seems to improve the sharpness of the Bahnitov star image. I made ones for both my 200mm RC f8 and 80mm f6 refractor and they work fine on both.
Cheers Peter
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