Hi,
When I shoot in low light/high ISO situations (typically ISO 3200-6400 which I often use for concerts), the photos often come with horizontal stripes of what looks like noise artifacts. They are very noticeable, for example on
this photo or
this one.
I shoot raw (DNG) and the stripes do not seem to depend on the raw converter I use (I usually use RawTherapee and I tried UFRaw with similar results). They are more obvious when I raise exposure compensation in PP, and they tend to disappear when I raise the black level in RawTherapee.
I can't swear these stripes have always been there, but I see them in photos taken at the end of april (I bought my K-5 new at the end of february).
Are they a known artifact of the K-5, or do I have a problem with my sensor?