Hi there,
I just received a Super A, I adapted some Russian m42 lens to K some are non coupled, I find only those coupled one can meter correctly.
I used a simple setup to test the lenses, I mount the camera on tripod about a meter from an indoor wall, all lenses are set to minium focal length at infinity focus and maxium aperture whenever possible, and I set the ISO of both camera to 800 in order to meter indoor, I then record the meter value of each lens on each camera in the same lighting condition, please see below for result.
Overall those coupled lens give similar reading on both camera, and on the Super A both Auto and M mode produces the same reading, but those non coupled lens are way off between the two camera, I don't know the Super A is faulty or can't meter correctly with non coupled lenses, it would be a great disappointment if it doesn't work with old lenses, I purchase this camera mainly for use with vintage lenses !!