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A focus mask primer
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01-01-2019, 07:57 PM
RickS
(Rick)
PI cult recruiter
Join Date: Apr 2010
Location: Brisbane
Posts: 10,584
Here's a shootout between a Bahtinov mask and two different versions that Ash 3D printed. 2 second subs with a 3nm Ha filter, Borg 55FL f/3.6 scope and ASI1600mm Pro camera.
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