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Issue with 40mm EF lens on 350D

Started Apr 4, 2015 | Questions thread
Doug Pardee
Doug Pardee Veteran Member • Posts: 9,920
Re: Issue with 40mm EF lens on 350D

I can't think of any reason that should happen. The lens only affects the metering in that it's expected to be wide-open (f/2.8 for that lens) during metering. Everything else is done by the camera body, and about the only thing metering cares about from the lens is the wide-open f-number (2.8 for that lens).

Have you tried removing and remounting the lens, to be sure you got good contact?

Is the viewfinder dim with that lens mounted? If so, it may be failing to "open wide" for metering.

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