grievor Posted November 11, 2015 Share #1 Â Posted November 11, 2015 Advertisement (gone after registration) I love my 28mm elmarit asph.. But seems like for certain shots I keep getting reddish borders and I couldn't figure out why... Is it a known issue of this lens? Link to post Share on other sites More sharing options...
Advertisement Posted November 11, 2015 Posted November 11, 2015 Hi grievor, Take a look here 28mm elmarit asph red borders. I'm sure you'll find what you were looking for!
Schrödinger's cat Posted November 11, 2015 Share #2  Posted November 11, 2015 I love my 28mm elmarit asph.. But seems like for certain shots I keep getting reddish borders and I couldn't figure out why... Is it a known issue of this lens? You haven't mentioned what camera you are using.  I will assume it is one of the digital models which reads the 6 bit code on the lens mount and sets the appropriate corrections to reduce the magenta edges you are seeing.  Is lens detection turned on?  Do your files report the correct lens being used ?  The attached photo is from an M240, with the lens detected circled in red. 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/252910-28mm-elmarit-asph-red-borders/?do=findComment&comment=2926162'>More sharing options...
grievor Posted November 11, 2015 Author Share #3 Â Posted November 11, 2015 Ah yeah it's a m240...forgot to mention....Yeah lens detection was on.. I think..hmm maybe I should pay more attention to that.. Probably might be the reason. But would that only affect the Jpeg files? The raw wouldn't be affected too right? Link to post Share on other sites More sharing options...
wda Posted November 11, 2015 Share #4 Â Posted November 11, 2015 Do consider using Profiles. Once you have established your standard desired camera settings, just save as a named profile. All explained in the Leica manual. Having done that, make a habit of checking that your profile is that desired for the moment and you are safe and don't have to worry whether you have set lens detection or AWB or DNG or whatever. Link to post Share on other sites More sharing options...
Schrödinger's cat Posted November 11, 2015 Share #5  Posted November 11, 2015 I'm curious.  Do your files report the correct lens being used ?  That's the easy answer. Link to post Share on other sites More sharing options...
grievor Posted November 11, 2015 Author Share #6 Â Posted November 11, 2015 I'm curious. Â Do your files report the correct lens being used ? That's the easy answer. Well I checked the lens profile was wrong... I set it to a 50mm cron profile because I was using the cron earlier and that doesn't have 6bit coding.. And I forgot to switch the profile when I changed lens.. Maybe that's the reason.. But funny thing I always though lens profiles were for Jpegs only and won't affect the raw files... Link to post Share on other sites More sharing options...
FlashGordonPhotography Posted November 11, 2015 Share #7 Â Posted November 11, 2015 Advertisement (gone after registration) Nope. Leica profiles for lens correction are written into the raw files as well. Otherwise many wider lenses would be unusable on the digital bodies. Â You should get the cron coded. Â Gordon Link to post Share on other sites More sharing options...
grievor Posted November 12, 2015 Author Share #8 Â Posted November 12, 2015 Nope. Leica profiles for lens correction are written into the raw files as well. Otherwise many wider lenses would be unusable on the digital bodies. Â You should get the cron coded. Â Gordon Haha maybe I should.. Thinking about just doing it myself with a sharpie and template. Been procrastinating on it. But I don't really find it that troublesome switching profiles in camera. Link to post Share on other sites More sharing options...
250swb Posted November 12, 2015 Share #9  Posted November 12, 2015 Haha maybe I should.. Thinking about just doing it myself with a sharpie and template. Been procrastinating on it. But I don't really find it that troublesome switching profiles in camera.  You should continue to procrastinate because it won't work, well not for more than a couple of lens changes. Either use a Dremel, buy a code-able 50mm flange and from eBay (the easiest option), or send it to Leica.  Steve Link to post Share on other sites More sharing options...
grievor Posted November 12, 2015 Author Share #10 Â Posted November 12, 2015 Ah well I'll try to get around to do that Link to post Share on other sites More sharing options...
Jeffry Abt Posted November 12, 2015 Share #11 Â Posted November 12, 2015 Nope. Leica profiles for lens correction are written into the raw files as well. Otherwise many wider lenses would be unusable on the digital bodies. Â Â I did not know this! ...good and useful info. Link to post Share on other sites More sharing options...
oyebto Posted November 15, 2015 Share #12 Â Posted November 15, 2015 just wondering, is there any way to apply the corrects done by the camera (adjusting color shift, etc) on lightroom instead? I tried applying lens profile in lightroom (SEM 21 f3.4 in this case) however the color shift is not corrected.. =\ Link to post Share on other sites More sharing options...
sdk Posted November 16, 2015 Share #13 Â Posted November 16, 2015 Lightroom lens profiles only correct geometric distortion for Leica M lenses. They don't correct color errors.You can download and use the Adobe DNG Flat Field Plugin for Lightroom to correct color casts on edges and corners, no matter the cause (missing profile, wrong profile, profiles that are ostensibly correct but don't work for your lens and camera, etc.). You need to photograph a white target with the lens, using same aperture and other lens profile settings as the affected photo(s) in similar light (though shutter speed doesn't have to match). Then you can use the plugin to correct either color casts or lens vignetting and color casts based on the white reference image. I use a credit card sized piece of white perspex (plexiglas) as my target, holding it right up to the lens to shoot through it. It works with any lens and digital camera, but the files have to be DNGs (most files can be converted, though Leica's native DNGs work fine). The plugin saves a new DNG file with the correction, distinguished by an "ff" near the end from the original file, which is preserved.Dante Stella wrote a good article that touches on using the plugin here:Â https://themachineplanet.wordpress.com/2014/04/20/zeiss-c-biogon-t-4521-zm-and-removing-the-reds/ Link to post Share on other sites More sharing options...
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