Using a manual focus lens I've noticed that when metering in Aperture Priority mode once I get past a certain f/stop, stopping down the lens any more doesn't seem to alter the metering - a single shutter speed just keeps flashing. I've looked through the manual regarding exposure warnings, but obviously it isn't going to speak to legacy lenses. It seems odd to me that if I want to shoot at f5.6 or f8 or whatever aperture in a dim environment the meter wouldn't be able to calculate the correct shutter speed past a certain point and short of the minimum shutter speed of the camera (full metering does seem to work in Manual, however, and the camera meters fine with the kit lens as one would expect it to). Am I doing something wrong or is this just a limitation with Aperture Priority and legacy lenses? Edit: A quick test - It seems like the maximum metered shutter speeds in A mode with a manual lens attached are as follows based on selected ISO: ISO 100-1.3", ISO 200-1/1.3, ISO 400-1/2.5, ISO 800-1/5 and ISO 1600-1/10. This seems very strange to me. Does anyone else have this issue?