cfritze Posted October 11, 2010 Share #1 Posted October 11, 2010 Advertisement (gone after registration) In a thread in the M9 forum re use of the camera for event shooting, I caught a mention by Chris Tribble of using lr3 to cure the m9 wide angle lens red edge. Cornerfix works well for this" but there are times where a fix in LR would be handy. Despite perusing online LR help, I'm still struggling to get the LR grad filters to. Do what I want. Any tips, Chris or others? Christian Link to post Share on other sites More sharing options...
Advertisement Posted October 11, 2010 Posted October 11, 2010 Hi cfritze, Take a look here Using LR3 graduated filters to reduce red edge. I'm sure you'll find what you were looking for!
zlatkob Posted October 11, 2010 Share #2 Posted October 11, 2010 I don't know about doing it in Lightroom, but Lindolfi's solution in this thread looks very easy for Photoshop users: http://www.l-camera-forum.com/leica-forum/digital-post-processing-forum/139467-m9-12-5-6-easy-correction.html The "divide" mode is new in Photoshop CS5 (I am still on CS4). Has anyone else tried it? Link to post Share on other sites More sharing options...
chris_tribble Posted October 11, 2010 Share #3 Posted October 11, 2010 Hi - haven't tried Divide mode - must check. In Lightroom 3 my solution is given as five steps below. Once you've saved the pair of Graduated Filters as a preset you can batch apply them to other landscape images. Create a new preset for Portrait images. (BTW - Christian - I've found that the 85 / 25 mix is better than my recommended 91 / 25). You may NOT feel this works if you're mainly concerned to take photos of white cards or brick walls (though the principle will work I'm fairly sure). It certainly works for real-world image correction. BTW - I should also say that I have no visible problems with red-edge with the Zeiss 18 in decent lighting. It only emerges in marginal, vile mixed low-light conditions Hope this sequence helps: Link to post Share on other sites More sharing options...
cfritze Posted October 11, 2010 Author Share #4 Posted October 11, 2010 Chris- thanks for taking the time to post some screenshots. Helped me get past my roadblock in a few short minutes. ...and the divide mode trick in PS may also work in GIMP. Having a workaround within LR keeps me from having to jump between too many applications Thanks again Ch Link to post Share on other sites More sharing options...
Guido Posted October 11, 2010 Share #5 Posted October 11, 2010 I recall from somewhere on the Adobe website that the Divide mode is the same as inverting a layer and using the Color Dodge blend mode. Link to post Share on other sites More sharing options...
ho_co Posted October 12, 2010 Share #6 Posted October 12, 2010 Chris-- I'm not as familiar with LR as maybe I should be to be reading this thread, so the screenshots don't speak to me that well. Could you (or someone) jot down for each of the screenshots what you're doing? I guess in the second picture, you're choosing a mask color? Are you doing that by eye? I know Photoshop makes it possible to identify a given color with numeric referents, but I don't see anything like that here. Thanks! On the other hand, if I'm the only one lost, I can stay that way with no dire consequences... Link to post Share on other sites More sharing options...
chris_tribble Posted October 12, 2010 Share #7 Posted October 12, 2010 Advertisement (gone after registration) Howard - I've annotated the screen shots. Hope this helps. Because Lightroom is non-destructive, I think that the layers analogy doesn't apply in quite the same way as it does in Photoshop. The two graduated filters that are applied through this process can be removed at any point - or adjusted. My experience is that the colour values I've used here work. If anyone is able to improve this process and make it more objectively valid I'd be really grateful. I know I should go an photograph some white walls in crappy light, but I just don't seem to get round to doing it. The space at King's Place shown in the examples is dreadful - it's not designed for performance and lighting is kept at low levels as part of an overall energy conservation policy. Let me know if more explanation's needed. IMHO the Lightroom pathway is hugely advantageous because it means you only need to use one application + the changes can be reversed / edited. Link to post Share on other sites More sharing options...
ho_co Posted October 12, 2010 Share #8 Posted October 12, 2010 Great, Chris. I'm embarrassed to be a PITA, but the annotations help a lot. Many thanks! Link to post Share on other sites More sharing options...
chris_tribble Posted October 12, 2010 Share #9 Posted October 12, 2010 No worries! Link to post Share on other sites More sharing options...
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