jklotz Posted December 31, 2009 Share #1 Posted December 31, 2009 Advertisement (gone after registration) I'm new to the M9, but I have been seeing some IR issues with black fabric and the like. Not nearly as bad as the M8 was, but it's still there. I saved all of my IR filters from the M8. Anybody using IR filters with their M9's? Link to post Share on other sites More sharing options...
Advertisement Posted December 31, 2009 Posted December 31, 2009 Hi jklotz, Take a look here To IR or not IR, that is the question!. I'm sure you'll find what you were looking for!
lars_bergquist Posted December 31, 2009 Share #2 Posted December 31, 2009 You may get away with that on lenses longer than 35 or 50mm, but not with wide angle lenses. The filters do still cause cyan vignetting, and the M9 has no firmware to correct it. And the reason why some black fabrics still look slightly purplish, is that they actually ARE slightly purplish. The old man from the Age of the Yellow Filter Link to post Share on other sites More sharing options...
jklotz Posted December 31, 2009 Author Share #3 Posted December 31, 2009 Thanks Lars. You may very well be correct, but all I know is that when I took this shot, the guy had a black sweater on. Link to post Share on other sites More sharing options...
yanidel Posted December 31, 2009 Share #4 Posted December 31, 2009 I'm new to the M9, but I have been seeing some IR issues with black fabric and the like. Not nearly as bad as the M8 was, but it's still there. I saved all of my IR filters from the M8. Anybody using IR filters with their M9's? I use one on my 60mm to protect the lens. No effect on the image. On my 24mm and 35mm I bought UV only to protect the lens as I avoid hoods whenever I can. Link to post Share on other sites More sharing options...
doug_m Posted December 31, 2009 Share #5 Posted December 31, 2009 I have used my M9 a lot (since Sept 09) and leave the IR filters on from 24 lux to 90 mm AA as I also have an M8. I have not seen any problems -even with the 24 lux- but others who have more expertise disagree with leaving the filters on. A Leica USA expert told me the 24 lux front element design might allow for leaving the UV/IR fliters on but that this may not work on other 24s. Link to post Share on other sites More sharing options...
jaapv Posted January 1, 2010 Share #6 Posted January 1, 2010 Thanks Lars. You may very well be correct, but all I know is that when I took this shot, the guy had a black sweater on. Well,just put a black point on the darkest area of the sweater. No chance of a green cast anywhere, as the shot is slighly reddish everywhere. 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/108262-to-ir-or-not-ir-that-is-the-question/?do=findComment&comment=1170300'>More sharing options...
jaapv Posted January 1, 2010 Share #7 Posted January 1, 2010 Advertisement (gone after registration) Actually, a grey point on the arm to the right is not a bad idea either to get the colour balance moving in the right direction. 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/108262-to-ir-or-not-ir-that-is-the-question/?do=findComment&comment=1170310'>More sharing options...
punktum Posted January 2, 2010 Share #8 Posted January 2, 2010 check out dpreview. They tested it and say no IR Issue. Link to post Share on other sites More sharing options...
andym911 Posted January 2, 2010 Share #9 Posted January 2, 2010 Not an M9 user but even my local dealer (leicabeimeister) say that the M9 is recommended to be used with IR Cut filters. Have seen lots and lots of shots where this is evident...not saying its bad but like some other cameras the M9 has an IR issue, albeit less than the M8 regards andy Link to post Share on other sites More sharing options...
lct Posted January 2, 2010 Share #10 Posted January 2, 2010 ...the reason why some black fabrics still look slightly purplish, is that they actually ARE slightly purplish... Reminds me an old thread. http://www.l-camera-forum.com/leica-forum/digital-forum/21348-ir-cut-filter-reflections.html#post224912 Link to post Share on other sites More sharing options...
sfokevin Posted January 2, 2010 Share #11 Posted January 2, 2010 check out dpreview. They tested it and say no IR Issue. Were these tests performed at the free Solms junket provided to select reviewers?. Link to post Share on other sites More sharing options...
Jamie Roberts Posted January 3, 2010 Share #12 Posted January 3, 2010 Jaap is correct; the original has a red cast. Nothing to do with IR contamination IMO. In other words, if you took this shot and processed it the same way with an IR filter it would still be too red. Link to post Share on other sites More sharing options...
lars_bergquist Posted January 3, 2010 Share #13 Posted January 3, 2010 In the 1880's--1890's the respectable public was outraged when the impressionist painters painted cast shadows blue. The perverted bastards! Everybody KNEW that shadows were grey! Just look at all those excellent 'Salon' paintings -- grey shadows everywhere! They do this on purpose just to scandalize us! -- And still those shadows in a sunlit scene ARE blue, because they are illuminated mainly by light from the blue sky (7000--15000K), not from the sun (5500K). That was what the painters did see. In the early days of colour film, respectable people were upset when a white dress in the shadow under trees took on a slight green cast -- and when snow lit by a low sun turned reddish. Red snow?! Clearly colour film technology was deficient. Everybody KNEW (some people do still 'know') that a white dress was always dead neutral white, and that snow is also dead neutral white, as per specifications. There is fortunately always Photoshop, so that these orderly and upright people can correct this disorderly and suspect optical reality, in line with what they KNOW real, respectable reality should look like, if it knew what was good for it. Same with those 'black' fabrics. Black is not a colour. It is an absence of light. Mostly, this absence is not total. Some light is reflected, and reveals that 'black' is just an exceptionally dark brown (as with hair or fur) or an exceptionally dark blue, or an exceptionally dark magenta. But we sane, respectable and steady people KNOW that this is not true. A black tee is just that, BLACK, which is a colour with the unusual property of excluding all others. A black tee should be just that, BLACK, if it knew what is good for it. Do you get me? How 'black' black is in reality, in the immediate real situation, depends not only on its spectral refelctance properties, but also on the actual lighting. And the blackness is always only THAT blackness, THERE and THEN. Thank Heaven for PP, that can wash, iron and starch this untidy reality until it conforms with our preconceived notions. Or prejuduces. The old man who painted before he photographed Link to post Share on other sites More sharing options...
UliWer Posted January 3, 2010 Share #14 Posted January 3, 2010 Not an M9 user but even my local dealer (leicabeimeister) say that the M9 is recommended to be used with IR Cut filters.... The people from Meister should discuss their recommendation with Leica. They are giving the following advise in the M9-manual (p. 73): Hinweis: Leica UV/IR Filter, die speziell für die Verwendung an der LEICA M8 und M8.2 entwickelt wurden, sollten an der LEICA M9 nicht verwendet werden, da es ins- besondere mit Weitwinkelobjektiven zu Farbverschie- bungen an den Bildrändern kommen kann. "... should not be used with the M9...." Link to post Share on other sites More sharing options...
jklotz Posted January 3, 2010 Author Share #15 Posted January 3, 2010 OK, so mythbusters it is.... Here's a shot balanced to the grey spot on the color checker. 50 cron, m9, daylight. Bag is black as black can be. You tell me - does the M9 have IR issues still? Link to post Share on other sites More sharing options...
jaapv Posted January 3, 2010 Share #16 Posted January 3, 2010 About the same as any digital camera. In was using 486 filters long before the M8 for maximum colour accuracy, and still do on any digital camera when there is a lot of IR around. I have Rodenstock sunglasse which "purple" blacks worse than my M8. Very practical for M8 shooting. Bears out Lars' posts. Btw, my CS4 colour balance does not match yours on the same grey spot. This is a click on that spot: Could someone else check that out as well? 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/108262-to-ir-or-not-ir-that-is-the-question/?do=findComment&comment=1172965'>More sharing options...
Nicoleica Posted January 3, 2010 Share #17 Posted January 3, 2010 OK, so mythbusters it is.... Here's a shot balanced to the grey spot on the color checker. 50 cron, m9, daylight. Bag is black as black can be. You tell me - does the M9 have IR issues still? Maybe it's me, but the straps and the fabric on the zipper look a tad purple to me. They certainly don't look anything close to the black on the colour checker. Link to post Share on other sites More sharing options...
jaapv Posted January 3, 2010 Share #18 Posted January 3, 2010 That is correct, Nicole. Leica does not claim a 100% IR blocking for the M9. The official position f Leica is that the filter should be 1.0 mm thick for that, but that would compromise image quality too much. The filter is 0.8 mm thick, which blocks just over 90%, putting the M9 in the top 30 % of digital cameras in this respect. For otal IR blocking a filter must be used, but for normal shooting there is no need for filters. Photoshop will help too, with this small a residual amount. Link to post Share on other sites More sharing options...
jklotz Posted January 3, 2010 Author Share #19 Posted January 3, 2010 For arguments sake, here's one with an M9, 75 summarit and Leica E46 uv/ir filter Link to post Share on other sites More sharing options...
jaapv Posted January 3, 2010 Share #20 Posted January 3, 2010 Exactly why I sometimes use IR filters, even on "IR-free" cameras like the DMR. It makes a difference.... Link to post Share on other sites More sharing options...
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