hjernemadsen Posted November 6, 2009 Share #1 Posted November 6, 2009 Advertisement (gone after registration) I have read about the magenta cast - especially to occur in the lower right hand corner of the image. But is this amount of cast to be expected? It is most noticeable in the right side of the image but it is also seen on the lower left side. It is especially (only?) apparent on images taken with my 28 mm cron. This image was taken at aperture 2.0. the exposure has been lifted slightly but otherwise the image has just been converted from DNG to JPG in lightroom. ISO was 80 and white balance was set to AUTO (!) Sincerely Peter 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/102802-magenta-cast/?do=findComment&comment=1105899'>More sharing options...
Advertisement Posted November 6, 2009 Posted November 6, 2009 Hi hjernemadsen, Take a look here Magenta Cast. I'm sure you'll find what you were looking for!
chrism Posted November 6, 2009 Share #2 Posted November 6, 2009 I'd say that is more noticeable than I would have expected with a 28. You did have lens detection on, didn't you? If it was a hand-coded 28, was it recognised correctly? My Elmarit 24 doesn't show anything like that. Chris Link to post Share on other sites More sharing options...
adan Posted November 6, 2009 Share #3 Posted November 6, 2009 I can't speak for the 28 f/2 in particular, but that is about what I get from my coded 21 f/2.8 (wider lens, but smaller aperture). Actually in your shot I see magenta on the left and across the bottom, and less on the right (except the bottom). I (personally) think this is something that Leica can and will cure with a firmware upgrade to the stored correction data for each lens. I was just about ready to post myself, asking for an update from those in the know. I think some members with company contacts were going to ask Leica about this issue. I hope Leica realizes it IS an issue. In the meantime, there is Sandy's CornerFix - and I also built a workaround of my own using Photoshop's calculate functions and a black file with green corners built from my own 21 and a blank white wall. Link to post Share on other sites More sharing options...
tashley Posted November 6, 2009 Share #4 Posted November 6, 2009 I can't speak for the 28 f/2 in particular, but that is about what I get from my coded 21 f/2.8 (wider lens, but smaller aperture). Actually in your shot I see magenta on the left and across the bottom, and less on the right (except the bottom). I (personally) think this is something that Leica can and will cure with a firmware upgrade to the stored correction data for each lens. I was just about ready to post myself, asking for an update from those in the know. I think some members with company contacts were going to ask Leica about this issue. I hope Leica realizes it IS an issue. In the meantime, there is Sandy's CornerFix - and I also built a workaround of my own using Photoshop's calculate functions and a black file with green corners built from my own 21 and a blank white wall. Jono and myself have been talking about it with them and it seems to be a matter, as you suggest, of getting the correction date in FW just right. I think it's good to let them know there are issues but also to expect that it will get fixed! Tim Link to post Share on other sites More sharing options...
UliWer Posted November 6, 2009 Share #5 Posted November 6, 2009 ....and white balance was set to AUTO (!) Just try to adjust the white balance a little bit in your raw-converter: a few degree less Kelvin and tint just a margin to the left (green). I noticed that it may solve the problem completely. Link to post Share on other sites More sharing options...
george_b Posted November 6, 2009 Share #6 Posted November 6, 2009 I have read about the magenta cast - especially to occur in the lower right hand corner of the image. Not only that on the LHS you can a circle (arc) of magenta with the narrowest past in the middle of the left hand frame edge. Link to post Share on other sites More sharing options...
gogopix Posted November 6, 2009 Share #7 Posted November 6, 2009 Advertisement (gone after registration) I'm ona thinkpad x300 so uncalibrated, but it just doesn't show up. It could be just a small profile shift. Link to post Share on other sites More sharing options...
ArtZ Posted November 6, 2009 Share #8 Posted November 6, 2009 There's no magenta cast on the M9... There's no magenta cast on the M9... There's no magenta cast on the M9... There's no magenta cast on the M9... There's no magenta cast on the M9... There's no magenta cast on the M9... There's no magenta cast on the M9... It's just a collective hallutination!!! :D Link to post Share on other sites More sharing options...
microview Posted November 6, 2009 Share #9 Posted November 6, 2009 [it's just a collective hallutination!!! Well, given the avatar you wouldn't expect all the spelling to be correct would you? What next, Homlet? Link to post Share on other sites More sharing options...
odyocu Posted November 6, 2009 Share #10 Posted November 6, 2009 It's like the first days with my M8 and uncoded lenses.(It was much worse though) Good to know that it can be fixed with FW. But why isn't it corrected before hitting the shelves in the first place? Link to post Share on other sites More sharing options...
hjernemadsen Posted November 6, 2009 Author Share #11 Posted November 6, 2009 Really: If it is a general problem that will be fixed by a Firmware upgrade sometime in the future I se no big problem. You can adjust your way around it. I only wanted to know if i was a particular problem related to my camera or lens. If that not the case I will not send my camera to Solms and instead wait happily for the firmware update. By the way lens detection is set to on and my lens i coded. sincerely Peter Link to post Share on other sites More sharing options...
ArtZ Posted November 7, 2009 Share #12 Posted November 7, 2009 Well, given the avatar you wouldn't expect all the spelling to be correct would you? What next, Homlet? Although English is not my first language, I can speak a few foreign languages (I wonder how many you can speak)... but that's probably something difficult to understand for someone with a nick like yours... Have a lovely day! Link to post Share on other sites More sharing options...
luigi bertolotti Posted November 7, 2009 Share #13 Posted November 7, 2009 It's like the first days with my M8 and uncoded lenses.(It was much worse though)Good to know that it can be fixed with FW. But why isn't it corrected before hitting the shelves in the first place? To maintain the magic of 09/09/09, clearly... I think that most of people who decided to have their M9 AT ONCE (a respectable decision, even if it wasn't my one) have taken into account that the very first release of FW would have needed some fixes to come later. Link to post Share on other sites More sharing options...
t024484 Posted November 7, 2009 Share #14 Posted November 7, 2009 The simple solution to solve this magenta problem is: use cornerfix. Hans Link to post Share on other sites More sharing options...
lars_bergquist Posted November 7, 2009 Share #15 Posted November 7, 2009 Also, very few of us do take very many pictures of white walls and unbroken sky. With a normal subject, the effect is not really noticeable. What really is curious is why the effect is not seen equally in all corners. Ideas, anyone? The old man from the Real World (that existed long ago) Link to post Share on other sites More sharing options...
adan Posted November 7, 2009 Share #16 Posted November 7, 2009 Lars, I have many ideas - not all of them necessarily rational: a batch of sensors with the microlens layer offset to one side by a mm or so during manufacturing; sensors mounted slightly off-center in the camera; two halves of the CCD reading out through separate channels and receiving slightly different corrections; yet another case of digital demanding more perfection (in this case, centering) in lens building than film required, so lenses built pre-M9 suffer.... Link to post Share on other sites More sharing options...
UliWer Posted November 7, 2009 Share #17 Posted November 7, 2009 Also, very few of us do take very many pictures of white walls and unbroken sky. With a normal subject, the effect is not really noticeable. What really is curious is why the effect is not seen equally in all corners. Ideas, anyone? The old man from the Real World (that existed long ago) Just try to take a picture of a grey card with your 18mm lens and avoid any differences of lighting from one side or the other. Use lens detection "on". and auto white balance. If you get the "red shift on the edges, I am certain it will be very regular. CornerFix handles the issue well. I have been succesful as well by a slight adjustment of white balance. Link to post Share on other sites More sharing options...
Nicoleica Posted November 7, 2009 Share #18 Posted November 7, 2009 There's no magenta cast on the M9...There's no magenta cast on the M9... There's no magenta cast on the M9... There's no magenta cast on the M9... There's no magenta cast on the M9... There's no magenta cast on the M9... There's no magenta cast on the M9... It's just a collective hallutination!!! :D I had heard that it was actually caused by M9 owners not taking off their rose-tinted glasses. Link to post Share on other sites More sharing options...
Doc Henry Posted November 7, 2009 Share #19 Posted November 7, 2009 I had heard that it was actually caused by M9 owners not taking off their rose-tinted glasses. and for you Nicole Seeing the world through rose-tinted glasses@Everything2.com Link to post Share on other sites More sharing options...
jaapv Posted November 10, 2009 Share #20 Posted November 10, 2009 I have a problem here - I cannot reproduce this cast with my Summilux 24... Link to post Share on other sites More sharing options...
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