Vincent Lowe Posted September 11, 2013 Share Posted September 11, 2013 What do think has caused this ring mark ..... It's very feint (I've wacked the contrast right up here) and it's at the bottom edge of the image so it's only visible on vertically oriented images where there's plain colour, usually blue sky. I'm not going to bother trying to clear it as it's the only mark on my sensor at the moment and I'd probably end up making things worse. I'm just curious as to what may have caused it - it's only appeared recently. Camera is Nikon D300. Link to comment Share on other sites More sharing options...
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