jcolwell
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Hi Manfred,
This is kind of strange. I use a variety of Alt manual focus lenses with Leitax mounts and other adapters on my 1DX. I recall in your first Alt post, you said you're using a Novoflex adapter on the 1DX, now. Does this adapter have a chip? Also, is it possible that the adapter surface is shorting across some of the camera lens connections? In either case, you can check this by covering the camera connectors with a piece of tape, and then checking if the mounted lens behaves in the same way.
As for exposure, you could try a variety of approaches, but Centre-weighted average metering should probably be the best bet (see pg. 104 of the manual). Also, see C.Fn I - 7 which controls the spot meter linkage to AF points, to ensure it's disabled, in case you use Spot metering mode (pg. 210).
My experience shows me that different Alt lenses behave in different ways for metering, both when using the OVF and when using LiveView. Generally, I take a test images and check the histogram. I often use Manual exposure mode with Alt lenses, and just set it to where it works, regardless of what the meter thinks. OTOH, my Alts don't seem to be as far off as your Leica lenses.
Jim
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