WilliamG Posted January 31, 2018 Share #1 Posted January 31, 2018 Advertisement (gone after registration) Attached DNG picture was taken by Leica Q with UV filter. Does anyone know know why there is ripple on the blue sky? Thanks in advance! 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/281413-ripple-sky/?do=findComment&comment=3452304'>More sharing options...
Advertisement Posted January 31, 2018 Posted January 31, 2018 Hi WilliamG, Take a look here Ripple sky. I'm sure you'll find what you were looking for!
jaapv Posted February 1, 2018 Share #2 Posted February 1, 2018 Looks like some kind of moiré effect. If it is not the result of posterizing in the postprocessing I can only think of ice crystals in the upper atmosphere creating a structure. Link to post Share on other sites More sharing options...
HighlandK Posted February 1, 2018 Share #3 Posted February 1, 2018 I suspect post processing rather than atmospherics as it is fairly even in its pattern. It would be interesting to know what pp was done and with what software. Is the banding in the original out of camera DNG? That is the critical question, or just in this much reduced or other processed image? I know I have induced something similar in pp in trying to boost skies. If it is in the out of camera DNG are there other images with the problem and with or without the filter? Is it just a one off?. Very difficult to offer thoughts without the OP ruling out variables and providing more information. Link to post Share on other sites More sharing options...
stuny Posted February 1, 2018 Share #4 Posted February 1, 2018 Maybe the filter is at fault. Shoot a similar scene again, once with the filter on and once with the filter off. 1 Link to post Share on other sites More sharing options...
Leica Guy Posted February 1, 2018 Share #5 Posted February 1, 2018 I’m uncertain how to meaningfully contribute to solving this, but I have a few thoughts. Is it for sure in the image? If you zoom in on your computer does it remain in the image or is it some kind of display artifact? What program processed the dng? Try a different program. 8 bit, 16 bit, 32 bit? Could it be an interference with the uv filter? Seems unlikely to me. Original image dng or jpg? If jpg, what are settings in camera for sharpness and contrast? Go shoot a clear blue sky and is it there? What about moire control on LR develop module in the adjustment brush? Does that fix it? I’m anxious to see what the root of this is. I suspect it’s something obvious that I’m missing. Thanks for posting. Link to post Share on other sites More sharing options...
Donzo98 Posted February 1, 2018 Share #6 Posted February 1, 2018 Likely from downsizing the jpg. Link to post Share on other sites More sharing options...
jmschuh Posted February 1, 2018 Share #7 Posted February 1, 2018 Advertisement (gone after registration) Not a Q problem. It's a post processing problem. Link to post Share on other sites More sharing options...
pgk Posted February 1, 2018 Share #8 Posted February 1, 2018 Its curve matches that of posterisation in the highlights on the 'horizon' so I'd suspect its as a result of highlight recovery in post processing. Link to post Share on other sites More sharing options...
jaapv Posted February 1, 2018 Share #9 Posted February 1, 2018 The ice crystals were a bit tongue-in-cheek way out. I too think it is posterizing caused by processing. Did you start out from a JPG? - that would easily explain the effect. Link to post Share on other sites More sharing options...
antigallican Posted February 2, 2018 Share #10 Posted February 2, 2018 jpeg=work of the devil! Link to post Share on other sites More sharing options...
Leica Guy Posted February 2, 2018 Share #11 Posted February 2, 2018 Attached DNG picture was taken by Leica Q with UV filter. Does anyone know know why there is ripple on the blue sky? Thanks in advance! Are you sure it’s a DNG? The consensus seems to be it’s a jpeg artifact. Link to post Share on other sites More sharing options...
jaapv Posted February 2, 2018 Share #12 Posted February 2, 2018 If it is a DNG, please link to a Yousendit (or similar service) file. We can have a look then. Link to post Share on other sites More sharing options...
Tailwagger Posted February 2, 2018 Share #13 Posted February 2, 2018 If it is a DNG, please link to a Yousendit (or similar service) file. We can have a look then. Or at least show us the histogram (pre and post if anything beens altered). The lack of shadow detail makes me suspect, as have others, that some PP was done and perhaps the original was under exposed. One can induce these sorts of effect bumping the exposure up, by mucking about with the individual colors which can cause clipping or what might be be compression artifacts when converting to jpg. 1 Link to post Share on other sites More sharing options...
pico Posted February 2, 2018 Share #14 Posted February 2, 2018 There are obvious 'jaggies' throughout the image, so it is likely over-compressed. Link to post Share on other sites More sharing options...
WilliamG Posted February 2, 2018 Author Share #15 Posted February 2, 2018 I suspect post processing rather than atmospherics as it is fairly even in its pattern. It would be interesting to know what pp was done and with what software. Is the banding in the original out of camera DNG? That is the critical question, or just in this much reduced or other processed image? I know I have induced something similar in pp in trying to boost skies. If it is in the out of camera DNG are there other images with the problem and with or without the filter? Is it just a one off?. Very difficult to offer thoughts without the OP ruling out variables and providing more information. The banding is from original DNG. I'll try it again with out filter. Link to post Share on other sites More sharing options...
pgk Posted February 2, 2018 Share #16 Posted February 2, 2018 Its not the filter. Link to post Share on other sites More sharing options...
WilliamG Posted February 2, 2018 Author Share #17 Posted February 2, 2018 Its not the filter. It happens sometimes only with or without filter. The banding can be seen on original DNG file. Link to post Share on other sites More sharing options...
WilliamG Posted February 2, 2018 Author Share #18 Posted February 2, 2018 Not a Q problem. It's a post processing problem. I copied the photo from SD card to laptop. And the banding can be seen when opening it with a picture editor in Windows. Link to post Share on other sites More sharing options...
jmschuh Posted February 2, 2018 Share #19 Posted February 2, 2018 I copied the photo from SD card to laptop. And the banding can be seen when opening it with a picture editor in Windows. DNG or JPG? Picture Editor in Windows? Grmpf… lol This is not a camera / sensor "banding", this is a too small bit depth. A software or software setting problem. 1 Link to post Share on other sites More sharing options...
Leica Guy Posted February 2, 2018 Share #20 Posted February 2, 2018 I copied the photo from SD card to laptop. And the banding can be seen when opening it with a picture editor in Windows. William. Does your picture editor in windows have a profile for correctly processing the Leica Q DNG? I’d strongly suspect this is the problem. Find someone who has Lightroom, Photoshop, Camera Raw or Capture One and import into one of those. I bet you won’t see any weird artifacts. Link to post Share on other sites More sharing options...
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