Round aperture or hexagonal?
Round aperture or hexagonal?
Frank, while you're waiting for someone with a 203 to answer, the Supermatic that my 127 Ektar is mounted in has a pentagonal opening with very slightly rounded sides.
Frank,
I just bought one here and it has 5 blades and the aperture is a pentagram as Oren described.
Jim Cole
Flagstaff, AZ
Pentagon.
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