I am looking for some assistance with my K20D. It is 3 months out of warranty (go figure) so I am looking for some input from the experts and enthusiasts here. In the past week, I have noticed some discoloration in my images -- consistently on the left side of the image where the image is darkened. Some details that I think would be useful to know:
1) The problem occurs on various lenses
2) The problem cannot be seen via the viewfinder.
3) It is observed when using the live view (open shutter).
4) I have tried various ISO / apertures / focal lengths
5) The problem is observed most in darker scenarios, but does exist in well lit settings.
I have included two images below of a wall in my house (with and without flash). The wall is a solid color (light blue). The problem is observed by noting the vertical divider (a horizontal gradient) to the right of center.
I am thinking I am looking at a sensor that needs to be replaced, but I am looking for opinions, information on if this is common (or even has a term), ideas on how to correct this problem, or a confirmation on my sensor thought. This problem does not seem consistent with dirt/dust dark spots, but I have not ruled that out with a cleaning yet.
Thanks in advance for any assistance and taking the time to read this post.
-James