Yep, exposure error not processing error. The processing looks very good actually.
Some common causes:
- film speed setting accidentally changed (OK, you checked that)
- compensation setting accidentally changed
- sticky aperture not closing down properly (shots wide open will be correct, shots at smaller apertures will be overexposed and have less DOF than expected)
- faulty shutter running slow at some speeds
- if the metering is via a separate cell instead of through the lens (TTL), did you maybe cover the cell up with a finger for a couple of shots?
- if the camera has AE-lock, did you accidentally leave that on?
So if I were you, I would do some testing alternating between larger and smaller apertures to see if that causes a difference. Shoot one scene at (for example, choose appropriate metering settings for your light level) f/2 1/250 then f/8 1/15 - they should have the same density but differ in depth of field and maybe motion blur.
If you get a density difference from that test, you're getting closer to finding the problem:
- if the small-aperture shot still has shallow DOF, then your aperture is probably sticky (failure to stop down before shutter opened).
- if the DOF change is appropriate, your shutter might be slow on some speeds so test it on all speeds. One or two speeds might be bad on a mechanical camera, highly unlikely on an electronic.
Last edited by polyglot; 02-28-2013 at 06:52 PM. Click to view previous post history.