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Hi Josh,
The 67 is available, in fact I printed 4 specimens, but I would need to know the filter thread size of your 35mm lens to be able to print one for that lens. I've never heard of anyone using a mask for such short focal length but I'm sure that is because no one has been making them with fine enough slits.
Based on my tests I believe that a mask with 0.9mm slits would work on a bright star with that lens. If that fails I can go to extremes an print one with 0.5 slits - the limit of my printer.
Regards,
Stefan
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