FD lens aperture

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I recently got a used FD 24/2.8. When I check it later at home, I found that the aperture remained at f/22 even though I set the aperture between f/2.8 to f/22. But when I set to 'A', the aperture remained at about f/5.6. Is it the mechanism of FD lens or is it something wrong in the lens? It is my first FD lens and have not yet got a manual Canon camera. Please advise.

-- Frankie (leesyf@archsd.gov.hk), December 07, 2001


When an FD lens is not mounted to a camera, the aperture will be around f:5.6. This is normal. It needs to be mounted with the shutter engaged or the stop down lever on the camera engaged for the lens to stop down.

-- David Goldfarb (dgoldfarb@barnard.edu), December 07, 2001.

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