Jon Pop Posted October 9, 2014 Share #1 Posted October 9, 2014 Advertisement (gone after registration) I recently shot some outdoor scenes with my M-P (240), with Summicron (current version) 50 f2 at ISO 640. In processing the DNG in LR (version 3.6), I noticed when zooming in (just using the "+" symbol and clicking on it) that on the subject's dark dark blue shirt, there are red speckles...ie. looks like RGB noise. I'm not new to post, and have used LR for a while with my M9. Never experienced this before. I'd not have expected it from the supposed better performance of the 240 sensor. And wouldn't expect this at ISO640...at all, even in the M9 (just in case there's a "ISO640 is too noisy for colour" suggestion). The camera has nearly no actuations on it. The shot was at mid-day outdoors...was at ISO640 because I'd just been shooting indoors, moving back and forth. I'm sure the red dots are everywhere...they just show up against the dark dark navy of the shirt in the photo. Thoughts? Link to post Share on other sites More sharing options...
Advertisement Posted October 9, 2014 Posted October 9, 2014 Hi Jon Pop, Take a look here Red "speckles"/noise. I'm sure you'll find what you were looking for!
mirekti Posted October 9, 2014 Share #2 Posted October 9, 2014 Photo? Link to post Share on other sites More sharing options...
Jon Pop Posted October 9, 2014 Author Share #3 Posted October 9, 2014 Here is a crop; note I've desaturated it somewhat to show a bit more of what I mean. This is from the DNG original, then exported thru LR3.6. It looks the same before and after export. Zoom in on the navy shirt and jeans and you'll see the red speckles quite easily. On my large Mac monitor they're quite easy to see. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/235230-red-specklesnoise/?do=findComment&comment=2686144'>More sharing options...
chris_tribble Posted October 9, 2014 Share #4 Posted October 9, 2014 Speckle's not clear on my high end Dell... Moire? Whatever, I'd strongly recommend updating you're version of LR - the newer RAW engine might make a serious difference to output. Link to post Share on other sites More sharing options...
wattsy Posted October 9, 2014 Share #5 Posted October 9, 2014 Can you post a 100% crop of the offending area? "Zooming in" doesn't make much sense with a web image. Link to post Share on other sites More sharing options...
mirekti Posted October 9, 2014 Share #6 Posted October 9, 2014 It might be the IR contamination, not sure, cannot see it well. As written above, a 100% crop would be preferred or a link to a dng file (dropbox or similar). Link to post Share on other sites More sharing options...
lct Posted October 9, 2014 Share #7 Posted October 9, 2014 Advertisement (gone after registration) I see no red nor magenta in the lady's shirt, even when adding 100% red and magenta saturation. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/235230-red-specklesnoise/?do=findComment&comment=2686252'>More sharing options...
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