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I am thinking what I am hitting up against is the Stan Moore's F ratio myth where he basically concludes its not Fratio but aperture and actually shows several CCD shots at different F ratios and the star looks the same.
Its a similar argument with DSLR lenses where full frame and APS equivalence of F ratio of a lens is the same ie. an F2.8 lens is F2.8 on either system. It creates lots of arguing posts for both sides.
Greg.
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