festgriff Posted April 11, 2007 Share #1 Posted April 11, 2007 Advertisement (gone after registration) Hi. I havent been able to find anything about purple blobs here in the forum, probably because I am using the wrong keywords. Anyway I would appreciate any ideas about the cause of the purple blobs in the attached photo. It is not the "purpling" of dark fabrics, nor does it seem to be IR refelection from plants as the rest of the foliage isnt showing it. It almost looks as if there was a spill of developer (to go analog). I have only seen this when shooting indirectly - not directly - into the sun. Lens hood is on, no IR filter yet though. 28-35-50 mm Tri-elmarit ASPH. Shot as DNG and imported into either Capture One or Lightroom - both give the same result. The purple blobs are there in a 35 mm and a 28 mm shot (here is the 35 mm shot) but not in the 50 mm which has me thinking it has do with the focal length and some time of aberration. But I could be totally off base there. Any ideas or suggstions - or just knowing some of you are also seeing the same effect would help. Thanks in advance. Link to post Share on other sites More sharing options...
Advertisement Posted April 11, 2007 Posted April 11, 2007 Hi festgriff, Take a look here purple blobs in photo with an M8. I'm sure you'll find what you were looking for!
jaapv Posted April 11, 2007 Share #2 Posted April 11, 2007 Highlight reflection of the IR filter / flare. Link to post Share on other sites More sharing options...
chetccox Posted April 11, 2007 Share #3 Posted April 11, 2007 But, the OP said he did not have a filter. Link to post Share on other sites More sharing options...
jaapv Posted April 11, 2007 Share #4 Posted April 11, 2007 In that case it is lens flare...I am in denial, but Leica lenses CAN flare in contrejour situations like this. Especially the Tri-Elmar. Link to post Share on other sites More sharing options...
wattsy Posted April 11, 2007 Share #5 Posted April 11, 2007 Almost certainly flare - in addition to the purple 'blobs', the image shows signs of the more general veiling glare that (in my experience) is a rather unfortunate characteristic of the TE at 50mm. I am in denial, but Leica lenses CAN flare in contrejour situations like this. Especially the Tri-Elmar. My 24/F2.8 (which I no longer own) used to regularly display some quite spectacular red flare spots/blobs when shot towards the sun (which I tend to do a lot of). My 35/F2 ASPH is also not entirely forgiving when used in this way. Link to post Share on other sites More sharing options...
lct Posted April 11, 2007 Share #6 Posted April 11, 2007 Looks like aperture flare at first glance but funnily enough nearly all the magenta of the picture seems to be concentrated in the spot. (100% magenta saturation) Link to post Share on other sites More sharing options...
carstenw Posted April 11, 2007 Share #7 Posted April 11, 2007 Advertisement (gone after registration) I have seen similar blobs on occasion with my CV15 and 35 Cron Asph. It happens so rarely, and usually only with a very powerful lightsource in the frame, so I don't worry. It is a part of life. Link to post Share on other sites More sharing options...
luigi bertolotti Posted April 11, 2007 Share #8 Posted April 11, 2007 I am almost sure that same shot/same lens on film Leica... blob...maybe different in color, but I bet a blob would have appeared... I obtained them with lenses ranging from 21 to 135 in similar situations... I think not a problem of M8 by itself, Carsten is right: part of life... Link to post Share on other sites More sharing options...
Ben Marks Posted April 11, 2007 Share #9 Posted April 11, 2007 Nonsense. It's an alien life form. Haven't you ever seen Star Trek? My favorite documentary. Ben Link to post Share on other sites More sharing options...
jaapv Posted April 11, 2007 Share #10 Posted April 11, 2007 The colour of the blob depends on the coating of the lens. Link to post Share on other sites More sharing options...
lct Posted April 11, 2007 Share #11 Posted April 11, 2007 The colour of the blob depends on the coating of the lens. Ah yes? I did not notice that, interesting thanks. So magenta coating here i guess. Link to post Share on other sites More sharing options...
festgriff Posted April 11, 2007 Author Share #12 Posted April 11, 2007 Thanks everyone for the constructive comments. I havent really noticed this kind of thing with my M6 and film so I was worried - and didnt think of flare. I did get flares on film once in a while in such circumstances but never a line of slowly shrinking blobs - maybe the alien star trek idea isnt that far off. Might just be that in this "honeymoon" stage with the M8 I push it a lot farther than I would the good old M6. Link to post Share on other sites More sharing options...
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