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Forum: Pentax Full Frame
09-09-2016, 05:08 PM
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The ZF.2 lenses have full support for camera selecting aperture. I suspect the stop-down lever works the same way in ZF lenses, but the absence of chips may restrict what Nikon's fussy cameras are willing to do.
I know that Pentax-A lenses generally have a calibration adjustment for the auto-aperture operation. Clamp screw in a slot with goop securing it.
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Forum: Pentax Full Frame
09-09-2016, 03:57 AM
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How about Zeiss offering parts kits to convert ZF or ZE lenses to ZK? I suspect Cosina designed the lenses so that very few parts differ. But perhaps there's a calibration step for the aperture lever?
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