brill64 Posted July 8, 2012 Share #1 Posted July 8, 2012 Advertisement (gone after registration) this strange artifact has started to appear on my images.. 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! Quote 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/183326-strange-artifact/?do=findComment&comment=2057928'>More sharing options...
Advertisement Posted July 8, 2012 Posted July 8, 2012 Hi brill64, Take a look here strange artifact... I'm sure you'll find what you were looking for!
brill64 Posted July 8, 2012 Author Share #2 Posted July 8, 2012 bottom right corner crop.. 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! Quote 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/183326-strange-artifact/?do=findComment&comment=2057929'>More sharing options...
mjh Posted July 8, 2012 Share #3 Posted July 8, 2012 I couldn’t say I’ve ever seen something like that before. A cluster of stuck pixels maybe (assuming it is present in all of your images and always at the same spot)? Your sensor hasn’t been hit by a laser by any chance? Quote Link to post Share on other sites More sharing options...
pico Posted July 8, 2012 Share #4 Posted July 8, 2012 Oh, the large wooden yacht. Yes, it appears in many of my photos, too, which is most disconcerting when doing interior architecture. Seriously, I've not seen that before, either. The fringe area puzzles me most. I look forward to finding out what it is. By the way, if the artifact appears on every photo in the very same place, there is a Photoshop action that can patch it automatically. Quote Link to post Share on other sites More sharing options...
brill64 Posted July 8, 2012 Author Share #5 Posted July 8, 2012 it appears on every image at exactly the same spot but not always white so i think it's probably not dead pixels. it lightens whatever's at that spot with the darker edge which appears not exactly spherical, more of an octahedron with straight edges. lenses used were both tri-elmars with a pop of flash but i don't think it's lens related. i'm going to give the sensor a wet clean & see what happens..thanks for your input..will keep you posted. 1 Quote Link to post Share on other sites More sharing options...
jaapv Posted July 8, 2012 Share #6 Posted July 8, 2012 Have a magnified look at your sensor first. If it is a glob of whatever you do not want to drag it all over the place and might want to have it cleaned professionally. Wild fantasy: A sunburn hole in the (plastic) microlenses? Quote Link to post Share on other sites More sharing options...
MichaelRabern Posted July 9, 2012 Share #7 Posted July 9, 2012 Advertisement (gone after registration) I am interested to know what you have learned. I am sure it's frustrating. Quote Link to post Share on other sites More sharing options...
250swb Posted July 9, 2012 Share #8 Posted July 9, 2012 I doubt it is dust because if you stop light getting to the sensor, like a great big blob of dust might, you don't just record a shadow as with 99% of dust, you get black. This is white. Steve Quote Link to post Share on other sites More sharing options...
jaapv Posted July 9, 2012 Share #9 Posted July 9, 2012 Indeed, but a blob of something transparant might act as a little lens, concentrating the light. (conjecture!) 1 Quote Link to post Share on other sites More sharing options...
pico Posted July 9, 2012 Share #10 Posted July 9, 2012 It might be interesting to shoot a black frame to see if the spot shows. (Manual under-exposure with lens cap on.) Quote Link to post Share on other sites More sharing options...
Jean-Michel Posted July 9, 2012 Share #11 Posted July 9, 2012 Hi, Probably best to send for repair.Not likely a matter of anything blocking light from the sensor, white equals exposure, not lack of. Perhaps a pinhole in the top shutter blade? Jean-Michel Quote Link to post Share on other sites More sharing options...
jaapv Posted July 9, 2012 Share #12 Posted July 9, 2012 I thought of that as well, but it would show up as a stripe. Quote Link to post Share on other sites More sharing options...
Jean-Michel Posted July 10, 2012 Share #13 Posted July 10, 2012 I thought of that as well, but it would show up as a stripe. Hi again, Perhaps, but not necessarily. If there is a pinhole and it is really a pin hole, it my allow enough exposure to create the spot while at rest, the added exposure during the shutter travel would be insignificant and not show up. But then again, this is also conjecture and the OP should have the camera checked by a Leica repair technician. Jean-Michel Quote Link to post Share on other sites More sharing options...
brill64 Posted July 12, 2012 Author Share #14 Posted July 12, 2012 thank you for all your useful comments. after a a good dust out with a rocket blower, a wet clean with two strokes back & forth followed by a full afternoon's shooting, the artefact has completely gone. it seemed to appear after a previous sensor wet clean by myself which may have left some residue or yeast bacterial growth of some sort behind over the following shoot (a home interior feature which was the houseboat example posted). it's very hot & humid here at the moment & that could have had an effect. fortunately no repairs required this time. many thanks again to all. Quote Link to post Share on other sites More sharing options...
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