I have a Nikon D60 camera here with a Nikkor 35 mm 1:1.8G lens. I don't have any experience with any other digital SLR, so excuse the beginner question.
When using aperture priority mode, a narrower aperture gives a very noticeably darker pictures. The picture becomes so dark that I usually feel the need to increase the exposure compensation setting when using a narrow aperture.
I would expect the automatic shutter speed adjustment to give pictures with approximately the same brightness, regardless of what aperture setting is used.
Is the behaviour I see usual? Or does it indicate a problem with the camera's metering? If it is usual, is there a technical reason for it (e.g. some limitation in how the metering is done)?
Here are two test photos to demonstrate what I mean: one and two. The first one was shot with an aperture setting of 3.5, the second one with 18 (you can see this in the EXIF info). The camera did not reach the fastest possible speed during this test and the metering was set to "matrix" to minimize the effect of me moving my hand between the two shots.
Some updates: The D60 continues to give noticeably incorrect exposures with this 35 mm lens when stopped down. It works fine with a 18-55 mm f/3.5-5.6 lens though. This would suggest that there's a problem with the lens. However, a D7100 gives consistent exposures with the same 35 mm lens regardless of aperture.