Originally posted by montman Granted, spot metering is a bad example to use. But look at example three. It is Multi segment metering or Matrix and is very under exposed even with a EV+7/10.
One suggestion for a control test. Assuming you have another lens that can shoot at the exact same setting (focal length, aperature) as your DA* 50-135mm, do the following.
1) On a tripod take a test shot with DA* 50-135mm with matrix metering in Av mode in an environment where the lighting does not change. Note down the aperture, shutter speed, ISO, and focal length.
2) Replace the DA* 50-135mm with another lens and shoot the same scene on a tripod in manual mode with same aperture, focal length, shutter speed and ISO.
If the exposure of the two photos are quite different then I guess there may be something wrong with your DA* 50-135mm. Maybe the aperture is not really what it says it should be due to aperture linkage misalignment in the lens???