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Thread: Leica Apo Telyt 280 F4 image circle

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    Nov 2010
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    Re: Leica Apo Telyt 280 F4 image circle

    I tested a Mamiya RZ350f5.6 Apo via a RZ67 - EF adapter on the Alpa FPS. For such long focal lengths, the (small) EF mount vignettes. A Leica R 180f2.8 Apo is no problem, the lens has sufficient image circle and corner sharpness for a IQ180, the EF mount does not cut the corners. I would expect that the EF mount would also cut the edges of the R 280f4 Apo.

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