With an adapter that has the electronic chip, the focus confirmation can be utilized when manually focusing. You will have to manually stop the lens down. The "auto" lenses have nothing in the camera to actuate the diaphragm.
There are two styles of adapters. One has a flange at the bottom, to depress the pin, in auto lenses, to actuate the diaphragm. The other does not. But neither actuate the diaphragm at the moment of the capture. I have grown to like the Russian lenses, that let me pre-set the aperture, and then open wide for focus. You just have to remember to go back to the desired aperture to get proper metering.
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