rickp13 Posted January 31, 2010 Share #1 Posted January 31, 2010 Advertisement (gone after registration) i recently removed the uv/ir filter from my summilux 75, mounted a new b&w 092 infra-red filter, and went for a walk to see how the filter works. opening the images tonight, i was surprised to see the photos divided vertically into two sections, one slightly lighter than the other. as it's my first time with infra red, and i didn't find a thread which described this problem, i'm curious if any of you have experienced the same issue? temperature around 0 centigrade (sticky shutter?) sensor with two levels of ir sensitivity? i picked two examples and posted them in black and white to highlight the problem. iso 160, 1/45 (bird) and 1/22. (sensor needs cleaning ) any ideas? thanks rick 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/111309-m8-and-the-bw-092-infrared-filter-question/?do=findComment&comment=1208373'>More sharing options...
Advertisement Posted January 31, 2010 Posted January 31, 2010 Hi rickp13, Take a look here m8 and the b&w 092 infrared filter question???. I'm sure you'll find what you were looking for!
stunsworth Posted January 31, 2010 Share #2 Posted January 31, 2010 I've not experienced that either shooting colour or IR, but in the early days of the M8 some people had a similar problem shooting normally. You have a sensor problem and the camera will need to be sent back to Leica if you want it corrected. Link to post Share on other sites More sharing options...
ho_co Posted February 1, 2010 Share #3 Posted February 1, 2010 Rick-- As Steve said, it's the sensor. Just happens that you discovered it when shooting IR. The sensor of a number of cameras, including M8, is divided into two halves, and you're seeing that division. Recommendation: Check to see if you can find any sign of it in your non-IR work. Reason is that if it's not visible (yet) at visible wavelengths, it may not be worth the cost of repair. Also, try some shots at normal room temperature to see if it might have to do with differential heating of the sensor. Yours is the first case I've seen linking the problem to shooting IR. I don't know whether it will get worse, but it's not likely to get better on its own, either. Good luck! Link to post Share on other sites More sharing options...
mtomalty Posted February 1, 2010 Share #4 Posted February 1, 2010 Howard, Why should there be a cost for repair ? This is a manufacturers (or third party parts supplier) defect plain and simple. Nothing the owner did, or could do, would provoke this issue. Mark Mark Tomalty Photography Montreal Canada Travel Landscape Stock FineArt Link to post Share on other sites More sharing options...
rickp13 Posted February 1, 2010 Author Share #5 Posted February 1, 2010 thank you all for looking and commenting. i've had the camera since april 2007, and this is the first time i've ever noticed such a difference in left and right sides of an image. the shot below was at the same near 0 centigrade temperature, with uv/ir filter without IR filter, and i don't notice the split no matter how i shift the brightness or contrast controls. leica CS is in the same country, just further south, so i'll send them the files and see if they can come up with an explanation. under warranty? we'll see. regards to all rick 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/111309-m8-and-the-bw-092-infrared-filter-question/?do=findComment&comment=1208785'>More sharing options...
ho_co Posted February 2, 2010 Share #6 Posted February 2, 2010 Rick-- I'm sure you've searched hard for a visual example. I think if you could find one, it would boost your likelihood of a warranty repair. In addition, for all we know at this point, maybe all the KAF-10500s do the same. You could design a layer in Photoshop to even out the two sides. Then just varying the opacity of that layer could compensate for future variations if they occur. Annoying but doable. A batch action could attach it to a selection of images with one click. It's an interesting discovery. Do keep us posted. And good luck! Why should there be a cost for repair ? This is a manufacturers (or third party parts supplier) defect plain and simple.... Mark-- Maybe so, if the camera is still under warranty. But I don't think you could call it a defect, since the sensor wasn't designed for IR-only illumination. In addition, maybe this is an example of a sensor's response changing with age. I can't ask my auto dealership to repair my transmission free after warranty expiration, even if I've only driven the car 100 miles. Link to post Share on other sites More sharing options...
mtomalty Posted February 2, 2010 Share #7 Posted February 2, 2010 Advertisement (gone after registration) Howard But you would be entitled to a warranty replacement if you had a sticky accelerator pedal regardless of your warranty status. Some things can be considered 'defective' even if they don't initially show the symptom Mark Link to post Share on other sites More sharing options...
mtomalty Posted February 2, 2010 Share #8 Posted February 2, 2010 Rick, The easiest way to see if the sensor split defect is present is to shoot some frames where there is a predominance of blue sky uninterrupted by clouds. The few cameras I have seen where this was present it was quite easy to see the split. To force the effect a bit convert a blue sky color original to black and white in Photoshop or Lightroom using a 'dark red' filer simulation. If the split is there this conversion should make it slightly more pronounced Apply the conversion to a similar old frame and see if it was present, earlier, even though it might have gone undetected Mark Link to post Share on other sites More sharing options...
rickp13 Posted February 2, 2010 Author Share #9 Posted February 2, 2010 good morning, mark and howard following mark's suggestion, the photo below was converted to b/w using silver efex red filter setting. brightness is up a bit, and the split is faintly visible at the marked point. first assumption: the split = differences in left and right in my camera, are always there to some degree, but are most visible a) with clear background (sky etc) and when an 092 and possibly other IR filters are used. more later rgds rick 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/111309-m8-and-the-bw-092-infrared-filter-question/?do=findComment&comment=1210025'>More sharing options...
rickp13 Posted March 16, 2010 Author Share #10 Posted March 16, 2010 good afternoon, all this note is just to wrap up this post and close the issue. i sent the sample photos (above) with my question to Leica CS in Solms. they reacted very quickly, and said send the camera. it apparently wasn't an infrared filter or sensitivity issue - that just made it easier to see the two levels on the sensor. they replaced the main electronics board, cleaned and adjusted sensor and rangefinder, did a thorough final check and returned the camera to me, all quickly and without charge. needless to say, i've always had this level of understanding and service from the factory, but i am pleased to be able to report a positive outcome to other posters on this thread. thanks for your ideas and support. greetings from hamburg rick Link to post Share on other sites More sharing options...
menos I M6 Posted March 17, 2010 Share #11 Posted March 17, 2010 good afternoon, all this note is just to wrap up this post and close the issue. i sent the sample photos (above) with my question to Leica CS in Solms. they reacted very quickly, and said send the camera. it apparently wasn't an infrared filter or sensitivity issue - that just made it easier to see the two levels on the sensor. they replaced the main electronics board, cleaned and adjusted sensor and rangefinder, did a thorough final check and returned the camera to me, all quickly and without charge. needless to say, i've always had this level of understanding and service from the factory, but i am pleased to be able to report a positive outcome to other posters on this thread. thanks for your ideas and support. greetings from hamburg rick Rick, thanks for the heads up on your issue. Link to post Share on other sites More sharing options...
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