Originally posted by aleonx3 It is quite possible that there is slight BF/FF issue with lens, which can likely be corrected it with fine adjustment feature on the camera.
My OP was referring to different situations. I prefer to use Av mode with A and FA and DFA lenses. But I also have several manual focus lenses that require the camera to be set to M. Several times I have forgotten to change to M with manual lenses. In these cases when the camera is in any other mode than M, the camera does not stop the aperture down but changes the shutter speed to correctly expose with the lens wide open.
What I should have said was that the main subject was in focus, but because the manual lens did not stop down to a smaller aperture while in Av, elements closer or more distant than the main subject were not sharp. When I realized that the camera was not set to M after changing from a modern lens, I reshot the photo. This time in Manual, the aperture stopped down as was set on the lens and the greater depth of field allowed more things to be in sharp focus as I originally intended.
I am considering just staying in M all the time. I am very comfortable with the "match needle" type of exposure system anyway. It has its advantages!