johnloumiles Posted May 11, 2011 Share #1 Posted May 11, 2011 Advertisement (gone after registration) Looking at the image below (click on image for full size) you can see that the gradiation from dark to light (towards the top right corner) in the sky is very rough. It seems the M8's dynamic range is not the best because if I manipulate the image with filters the issue is exacerbated greatly and can be seen without blowing up the picture. Is this just normal 2005 technology? Does anyone know the best way to smooth that out in post? Your input is greatly appreciated. http://img820.imageshack.us/img820/5195/l1221780.jpg Link to post Share on other sites More sharing options...
Advertisement Posted May 11, 2011 Posted May 11, 2011 Hi johnloumiles, Take a look here Is this normal for M8? "Rough Pixel Gradiation". I'm sure you'll find what you were looking for!
mjh Posted May 11, 2011 Share #2 Posted May 11, 2011 Frankly I don’t see the issue you are apparently seeing. Are you sure your display is set to millions of colours and properly calibrated? Link to post Share on other sites More sharing options...
ho_co Posted May 11, 2011 Share #3 Posted May 11, 2011 I don't see any jaggedness either. Check your display. Do you get better results from other cameras? Have you tried viewing this image on another computer/display? Your description sounds as if you're working from a small 8-bit JPG. Could be your file viewer. What software are you using to process and view the images? Link to post Share on other sites More sharing options...
johnloumiles Posted May 11, 2011 Author Share #4 Posted May 11, 2011 Sorry, Let me show a picture where the point I'm speaking about is more obvious without having to zoom. Thank you for your response mjh but all my screen settings are correct. You can now see what I'm talking about below. I added a filter to make it more visible. The filter added to the image is not that intense so its not literally ripping the picture apart (well I guess it is, but not in an extreme manner). Also there has been no film grain added to the image. If this is normal for the camera I have no problem with that, I still love it. I just want to know what you think is going on and maybe if you have any tips for smoothing out clear skies in general. Thanks! http://img202.imageshack.us/img202/7969/l1221253a.jpg Link to post Share on other sites More sharing options...
sandymc Posted May 11, 2011 Share #5 Posted May 11, 2011 I would guess uncoded lens - looks like vignetting to me. With the inevitable noise in the corners that comes with it. Solution: code lens, or use C1 Pro/CornerFix to correct in post. Won't fix the noise, by will sort out the apparent color variation. Sandy Link to post Share on other sites More sharing options...
johnloumiles Posted May 11, 2011 Author Share #6 Posted May 11, 2011 Sandy-Thank you very much, that definitely could be the case then as I'm using a Voightlander Nokton 40 mm and I know thats not coded. Now comes the inevitable google search on how to code lenses. HO-C - The image is converted from Raw in Lightroom and edited in CS3. The x1 seems to give smoother image in that regard but that may because of what sandy was saying. Thanks for the ideas! Link to post Share on other sites More sharing options...
CharlesL Posted May 11, 2011 Share #7 Posted May 11, 2011 Advertisement (gone after registration) Was the second photo taken at 8:42 p.m.? The Exif says 9:42, but maybe you have not changed the time since Daylight Savings Time. Seems like a tough lighting situation. Link to post Share on other sites More sharing options...
ho_co Posted May 11, 2011 Share #8 Posted May 11, 2011 ... Now comes the inevitable google search on how to code lenses.... There are a lot of threads on the topic on the forum as well. Link to post Share on other sites More sharing options...
johnloumiles Posted May 11, 2011 Author Share #9 Posted May 11, 2011 Hey Charles, Sorry I did not update the time at that point so it was off by a couple hours. It was around 6:30, golden hour, the perfect time of day for the sky to have a variety of hues. Link to post Share on other sites More sharing options...
efix Posted May 12, 2011 Share #10 Posted May 12, 2011 Looks to me like you're working with JPEGs from the camera. Don't. Use the DNGs. The camera-internal JPEG processing routine of the M8 isn't very good, and DNG gives you MUCH more processing latitued, as well as MUCH sharper and smoother files. Link to post Share on other sites More sharing options...
johnloumiles Posted May 12, 2011 Author Share #11 Posted May 12, 2011 Looks to me like you're working with JPEGs from the camera. Don't. Use the DNGs. The camera-internal JPEG processing routine of the M8 isn't very good, and DNG gives you MUCH more processing latitued, as well as MUCH sharper and smoother files. EFIX, as I stated above that image (along with every image I work with) was converted from raw and saved at the highest settings. Thanks for the input though, I know usually that would be the case with M8 Link to post Share on other sites More sharing options...
epand56 Posted May 12, 2011 Share #12 Posted May 12, 2011 I've never seen anything like that, even with uncoded lenses and missed pictures. It looks like something wrong in PP to me, something like too much contrast or wrong position of color sliders. Link to post Share on other sites More sharing options...
Lightwrangler Posted May 12, 2011 Share #13 Posted May 12, 2011 I don't think this has something to do with lens recognition. Looks more like rendering artifacts from downsizing picture resolution in your PP software. I get the same if I, for example, desaturate lower mid-tones and look at the whole picture in Lightroom. As soon as I zoom to 100% it disappears. It won't show up in prints anyway. Look at this capture of my screen in Lightroom: 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/151509-is-this-normal-for-m8-rough-pixel-gradiation/?do=findComment&comment=1670017'>More sharing options...
jaapv Posted May 12, 2011 Share #14 Posted May 12, 2011 It looks like the capture sharpening was not done correctly in raw conversion, resulting in excessive noise in the underexposed parts of the sky.Read the part about sharpening in the FAQ in the M9 forum. Link to post Share on other sites More sharing options...
Mikael Siirilä Posted May 12, 2011 Share #15 Posted May 12, 2011 Never seen anything like that with my M8 shots. Looks like PP caused it. Did not check the EXIF but I assume a shot like that would be ISO 160. Link to post Share on other sites More sharing options...
johnloumiles Posted May 12, 2011 Author Share #16 Posted May 12, 2011 Thank you to everyone who replied. It seems like now it could be a few things. I never thought it was the pp software or display because I could see the problem areas straight out of the camera in RAW that only are exacerbated when filters are added. Still I am not versed as most of you in the technical aspects of camera and software technology so I think only printing some of these out will prove that its the software/computer or a lens issue, or even a none issue, just the way the camera is. If Royal Corona is right the prints will be fine. I'll leave you with this image, as its not in the corners and it has not been edited except for a 3 point shift in cyan and 2 points of increased black. You can see the sky gradate a little rough when zooming in to 33%. This was shot ISO 320, Shutter 250, 1.4 http://img560.imageshack.us/img560/8941/l1221287a.jpg Thank you for you input! Link to post Share on other sites More sharing options...
lct Posted May 12, 2011 Share #17 Posted May 12, 2011 This is just digital noise, a good raw converter should handle it better than this imho. Link to post Share on other sites More sharing options...
hoppyman Posted May 13, 2011 Share #18 Posted May 13, 2011 John I would just add a comment on your last post.You mention seeing a problem at 33%. If you look at an image on your computer screen at anything other than 100% you are not seeing an accurate rendering. Link to post Share on other sites More sharing options...
TshawM8 Posted May 13, 2011 Share #19 Posted May 13, 2011 Honestly, in my opinion, even it was there in prints, how big are you printing? For the most part, aside from the picture with the vignetting, the problem seems so minute that it wont really make a different. If you were trying to print 13x19 or bigger I can then understand why it would be a bigger issue. Link to post Share on other sites More sharing options...
johnloumiles Posted May 13, 2011 Author Share #20 Posted May 13, 2011 I'm interested to print these, I'm currently out of town but when I bet back I will roll a few out. To answer your question I print between 11x17 or 13x19 on my own printer and up to 24 x 36 ( with canon d60) with professional printer. I'm also curious how far I can push the M8 printing wise. Link to post Share on other sites More sharing options...
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