C/Y Mount Zeiss 50mm 1.4 Aperture Blades

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Tarzankayaker New Member • Posts: 3
C/Y Mount Zeiss 50mm 1.4 Aperture Blades

Hello,

I bought a Carl Zeiss 50mm f/1.4 along with a Yashica FX-D to use the lens with an adapter on my A7. However, I'm unfamiliar with the quirks of the C/Y mount.

I noticed when the lens is off the camera the aperture closes slightly, even when set for f/1.4, but it opens fully as soon as I put it on the FX-D.

Is this how the lens is supposed to operate or is something broken? I haven't bought the adapter yet, so I'm trying to figure out if there is an issue before I spend the money.

Thanks!

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Carl Zeiss Planar T* 1,4/50 Sony a7
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