In some of my pictures, I've noticed some very thin dark verticle lines. These lines only appear in images featuring a blown out sky and it's in the sky portion that they are noticeable. A shutter speed slower than 1/200 is when they become noticeable.
They aren't noticaeable with a quick glance at the picture but, they are if you spend time looking at it.
I've ruled out lenses as the problem because, I've used two different lenses and the lines appear no matter what lens is used.
Lines also appear shooting jpeg or raw.
I went to my local camera store tonight to see if the guys there had an explanation as to what was the cause of the lines.
After both of them looked at the picture on their monitor, they couldn't come up with a definite answer. They used different parts of Photoshop to examine the picture and spent several minutes doing different things to it.
These guys do the photo developing at this store and have been doing it for a number of years so I'm sure they knew what they were doing and looking for.
One possible explanation given was that the sensor was dying but, he couldn't say that for certainty because the thing that was puzzling him was, the lines were only showing up in the "pure white" area of the picture.
Since getting home from the camera store, I've gone through some pictures and have come across more with the lines appearing under similar sky conditions.
One of the older pictures I came across that had the lines in it, was taken 3 months of buying the camera.
I bought the camera..Canon 40D.. brand new, two years ago this month from a well known camera store.
So, whatever is the cause of these lines, has been doing it basically since I bought the camera.
To me, the lines in the various pictures don't seem to be any different in size or darkness from past to present.
That might be a good sign in a way regarding the sensor because I would think things would've got much worse over a two year period of time.
Maybe, maybe not, I don't know.
I've started a thread about this a couple of days ago in the lens section under the subject ,Lines in pictures. Was on page 5 about an hour ago.
Thought I would post it here in a more general section thinking more people might see it and increase my chances of somebody who had the same issue, able to tell me what the cause was.
This picture shows a zoomed in area of part of the picture.
The lines aren't rain.
There has been some minimal post processing done to this particular picture but, the lines were there prior to doing it.