Samyang 14/2.8 aperture ring not working on FTZ

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AprilSum Regular Member • Posts: 109
Samyang 14/2.8 aperture ring not working on FTZ

The aperture ring is working with the lens alone and I can see aperture changes. But when I mounted it on FTZ, the aperture gradually turned larger and fixed at the maximum aperture. The aperture didn't change no matter how twist the ring with camera on and off. Anyone has the same problem? Thanks for any solutions.

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