gjames9142 Posted March 13, 2011 Share #1 Posted March 13, 2011 Advertisement (gone after registration) Is there any easy and foolproof way to get rid of chromatic aberration, as is seen in the branches top centre of a picture I took today? (Although it doesn't seem to be noticeable in the JEPG I posted.) Version 4 28 Elmarit. 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/146252-ca/?do=findComment&comment=1614671'>More sharing options...
Advertisement Posted March 13, 2011 Posted March 13, 2011 Hi gjames9142, Take a look here CA. I'm sure you'll find what you were looking for!
jaapv Posted March 14, 2011 Share #2 Posted March 14, 2011 Looks fine to me, I don't see any CA. Link to post Share on other sites More sharing options...
mustafasoleiman Posted March 14, 2011 Share #3 Posted March 14, 2011 Looks fine to me, I don't see any CA. Maybe not, but I have the same problem. My branches frequently take on a pink glow against the white sky... What can we do? Link to post Share on other sites More sharing options...
Washington Posted March 14, 2011 Share #4 Posted March 14, 2011 Looks good to me. But you are looking at your original full-size photo and can see what we can't. Link to post Share on other sites More sharing options...
Griswold Posted March 14, 2011 Share #5 Posted March 14, 2011 Capture One, CA tool. process and export. Link to post Share on other sites More sharing options...
ho_co Posted March 14, 2011 Share #6 Posted March 14, 2011 In my experience, a pink/magenta/purple fringe isn't uncommon in a case like that. If you're just seeing one color, it probably isn't chromatic aberration. Chromatic aberration shows up with one color on one side and the complementary color on the other. I had a very bad case similar to yours several years back and found that when I changed RAW processors, the funny color was greatly reduced. In my case, the change happened when Adobe updated Camera Raw. I understand the current version is improved again. Many people on the forum say that processing such shots in Capture One can virtually eliminate the artifacts. Another method I think some people use is to select the wrong-color stripe and desaturate it. Suggestion: On my screen, the problem is too small to be visible. A good way to show it so we can judge it is to post a crop of just part of the affected area. Enlarge to 100% or 200%, then do a screen grab of the problem and post it. Link to post Share on other sites More sharing options...
jaapv Posted March 14, 2011 Share #7 Posted March 14, 2011 Advertisement (gone after registration) For purple fringing search the forum. It is basically an interaction between high micro-contrast lenses, the sensor and the interpolation algorithms of the raw conversion. It is not classic CA as we know it from optical theory. Most raw converters have a defringing tool of varying effectiveness. C1 is probably the best for purple fringe, ACR quite good as well. One can use the the color replacement brush in CS to remove the offending color, or alternatively a corrected layer and a layer mask and brush. The fringing can also show up as blue or red. Btw, although it seems to be more apparent on the M8/9 (AA-filter-less sensor and extremely good lenses?), all digital cameras will show this phenomen. Link to post Share on other sites More sharing options...
250swb Posted March 14, 2011 Share #8 Posted March 14, 2011 Is there any easy and foolproof way to get rid of chromatic aberration, ... As well as defringing software a really simple way to do it is use the colour replacement tool in Photoshop. With this you can simply turn the aberrant colour into the background sky colour, or tree colour etc. Steve Link to post Share on other sites More sharing options...
zlatkob Posted March 14, 2011 Share #9 Posted March 14, 2011 Lightroom 3.3 > Develop Module > Lens Corrections > Manual > Defringe: On. If needed, also adjust Red/Cyan and Blue/Yellow sliders in the Lens Corrections section as needed (while viewing at 100%). Link to post Share on other sites More sharing options...
gjames9142 Posted March 14, 2011 Author Share #10 Posted March 14, 2011 Thanks all for the feedback. The "pink" is glaringly obvious in a thumbnail, but seems not to be readily apparent in the posted jpeg. I asked the question because I am finally getting a printing setup -- Epson 4990 as a kind of trial marriage for a possibly larger machine. Anyway, lot of good advice and I will probably get Capture One, too. I am not sure whether the detail I am about to post will show the little pink twigs I get on the screen. 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/146252-ca/?do=findComment&comment=1615209'>More sharing options...
jaapv Posted March 14, 2011 Share #11 Posted March 14, 2011 I can (just see what you mean now. I seriously doubt whether it will be visible in print. Don't forget that your computer screen is the worst possible instrument to judge your image for printing - but it is the only one we have. Link to post Share on other sites More sharing options...
Your Old Dog Posted March 14, 2011 Share #12 Posted March 14, 2011 ..................................... I am finally getting a printing setup -- Epson 4990 as a kind of trial marriage for a possibly larger machine. ........................................................ Do they come much bigger? I just got a Epson 4900 and it came on a semi truck mounted to a pallet. You don't take it out of the box, you remove the box from the printer. It took a doly and my wife and I to get it upstairs in my man cave. It barely fit through the doorways Did you mean from 17 to 24" ? Link to post Share on other sites More sharing options...
gjames9142 Posted March 14, 2011 Author Share #13 Posted March 14, 2011 The larger option would be the 9900 24-inch model. An artist friend has the 44-inch model, and it is very good, though his studio is in a former church hall. I have found two guys who will do the delivery. Now for the whole learning curve, as well as figuring which papers are best. Coming from silver printing, the choice in ink-jet is staggering. Link to post Share on other sites More sharing options...
gjames9142 Posted March 14, 2011 Author Share #14 Posted March 14, 2011 I am definitely going to have get Capture One. Looks like it will be better at dealing with problems such as the moire seen here, which seems pretty extreme. Luckily I have a better picture from the same sequence where there is no visble moire. 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/146252-ca/?do=findComment&comment=1615590'>More sharing options...
ho_co Posted March 14, 2011 Share #15 Posted March 14, 2011 There have also been a number of threads on various means of dealing with moiré. I'm not knocking Capture One, but there are other ways to handle the problem. Whatever software you use, the latest version will be much better at handling this kind of effect than the version from three years ago. Link to post Share on other sites More sharing options...
jaapv Posted March 15, 2011 Share #16 Posted March 15, 2011 I am definitely going to have get Capture One. Looks like it will be better at dealing with problems such as the moire seen here, which seems pretty extreme. Luckily I have a better picture from the same sequence where there is no visble moire.It is a foible of the M8/9 (and other AA-filterless cameras) we have to deal with. In this case, putting the focus plane exactly on the drummer and using a wide aperture would have defocussed the grid slightly, avoiding the moire. Not that we always realize such things at the time we take the image.Here, in PP you can just swipe a grey color replacement brush over the offending moire. Link to post Share on other sites More sharing options...
gjames9142 Posted March 15, 2011 Author Share #17 Posted March 15, 2011 Thanks, jaap. I am going to hire a LR geek for bit to get the printing setup and PP procedures going. I know it takes a long time. This image, taken a few seconds later, has no moire.In general I like deep focus/ I have never understood the "bokeh" thing. 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/146252-ca/?do=findComment&comment=1616177'>More sharing options...
!Nomad64 Posted March 15, 2011 Share #18 Posted March 15, 2011 Is there any easy and foolproof way to get rid of chromatic aberration[...] First, it's barely noticeable and I don't believe it affects the image at all. At least, not seen from here. As Jaap already pointed out, it's inherent in all digital cameras, albeit discernible in various degrees. The simplest foolproof way to get rid of it is... converting the picture in bw, if the final result is good for you. I tend to do that all the times I have to deal with the infamous M8's purple blacks or those rare cases in which I can't stand color dominances or purple fringing or whatever color-related issue. But I also understand that I'm keen to doing that because I tend to prefer bw over color and allow this latter to live only when its presence is actually structural in the picture. Cheers, Bruno Link to post Share on other sites More sharing options...
gjames9142 Posted March 15, 2011 Author Share #19 Posted March 15, 2011 Bruno, It seems a little extreme to go to B/W to avoid this problem. I have shot B/W film for decades - still do-- but the M9 seems a wonderful way to explore colour, which is at a stage of development far in advance of what was available with film and C-prints. Link to post Share on other sites More sharing options...
!Nomad64 Posted March 15, 2011 Share #20 Posted March 15, 2011 James, I enjoy color too, but when it gets across my way that's how I deal with it. I agree with you that my approach is quite an extreme one and that digital technology opened the gates to a whole new universe. But as said, that's good with me and my very personal background. It hasn't necessarily to be true for anyone else. I mentioned it only because I noticed that the first shot you posted is very desaturated and assumed -maybe mistakenly - that converting it in bw might have been acceptable to you. Cheers, Bruno Link to post Share on other sites More sharing options...
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