Guest willjanurgucken2000 Posted October 15, 2011 Share #1 Posted October 15, 2011 Advertisement (gone after registration) Hello! What the hell is that on my picture??? Seems like a raster or lines... M8 a ISO 2500, no post processing, only white balance, via LR3, Camera Standard Profile. 100% crop: http://s1.directupload.net/images/111015/imfcfapr.jpg Is this a sensor error? regards will Link to post Share on other sites More sharing options...
Advertisement Posted October 15, 2011 Posted October 15, 2011 Hi Guest willjanurgucken2000, Take a look here strange raster/lines on M8 pics. I'm sure you'll find what you were looking for!
adan Posted October 15, 2011 Share #2 Posted October 15, 2011 Without ruling out the possibility of a sensor problem (anything is possible) - I'm mostly seeing shadow noise banding that shows up fairly often with a perfectly "normal" M8 at ISO 2500 (and with practically any digital camera if shot in strange-enough light). Especially under non-daylight lighting. If the light is yellow enough, the blue-filtered pixels are essentially underexposed by another 2-3 stops (or more), compared to the overall exposure. Correcting the white balance effectively pushes (amplifies) those blue pixels to ISO 10,000-20,000 - and outs pops the banding. The attached is an M8 picture, under candlelight and white-balanced. ISO 1250. Lots of shadow banding, especially in the shirt at right. (Ignore the moire effects in the middle of the picture - those are from a doubled screened tent wall in the background, moire-ing with itself ) Link to post Share on other sites More sharing options...
Alberti Posted October 17, 2011 Share #3 Posted October 17, 2011 Will, Although I can't find a picture immediately, I remember these have also been identified also as JPEG artifacts [in adverse circumstances, low light indeed]. The square islands have been identified as the sectors of the compression algorithms. I have checked that banding on the internet a two or three years ago - and a similar picture was shown [of another camera, where the effect appeared at more light even]. I routinely throw away pictures with such artifacts. the are very seldom: subject matter, circumstance and lighting, and processing. Nothing to do with the esensor. Hope this helps you. albert Link to post Share on other sites More sharing options...
mjh Posted October 17, 2011 Share #4 Posted October 17, 2011 Is this a sensor error? Just the banding kind of noise that you get when pushing the sensor to its limits. Link to post Share on other sites More sharing options...
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