I have been experimenting with depth of field with all my lenses, trying to determine the best setting for each for maximum DOF.
A couple of weeks ago I had taken some pictures at a beach and noticed spots in the finished images on my HD monitor.
So... naturally I cleaned all my lenses THORUOUGHLY.
The next week I took some sunset pictures on a local Dam.
SAME result... but I noticed something; lens choice didn't matter as the spots were in the SAME location regardless of which lens was attached.
...So naturally, I cleaned my sensor THOROUGHLY.
But I also noticed that SOME pictures had spots and others did not.
EVERYTHING shot f/20 and up (ESPECIALLY f/22) was spotty. Below f/20 and the images were clean.
So yesterday I tried different lenses at f2.8 through f/32 in broad daylight, short exposure time conditions.
The spots are aperture dependent... nothing else matters.
Has anyone else encountered this situation or problem?
My next step is a professional sensor cleaning, but I'm afraid that may NOT make any difference.