markowich Posted November 19, 2006 Share #1 Posted November 19, 2006 Advertisement (gone after registration) ín 2500 iso shots i have consistentently a blue line on the left side of the frame if i shoot at over 1/50 sec, see L1000409.jpg photo - markowich photos at pbase.com anybody has seen this 'phenomenon' before? getting more and more desparate with m8, peter Link to post Share on other sites More sharing options...
Advertisement Posted November 19, 2006 Posted November 19, 2006 Hi markowich, Take a look here blue line in DNG file . I'm sure you'll find what you were looking for!
marknorton Posted November 19, 2006 Share #2 Posted November 19, 2006 Peter Is the blue line always in the same horizontal position? IMHO, a vertical line like this is indicative of a sensor fault. When the image sample is read out, the rows are shifted vertically into a read-out row and then horizontally. It looks to me like there is a problem with the read-out row so that any sample for this horizontal position is rendered the same colour. Back to the dealer or Leica I think. Link to post Share on other sites More sharing options...
markowich Posted November 19, 2006 Author Share #3 Posted November 19, 2006 Peter Is the blue line always in the same horizontal position? IMHO, a vertical line like this is indicative of a sensor fault. When the image sample is read out, the rows are shifted vertically into a read-out row and then horizontally. It looks to me like there is a problem with the read-out row so that any sample for this horizontal position is rendered the same colour. Back to the dealer or Leica I think. hi mark, yes the blue line-if it appaers- is always in the same position. i agree with your assessment on the faulty sensor. is it just mine or is it m8-endemic? peter Link to post Share on other sites More sharing options...
marknorton Posted November 19, 2006 Share #4 Posted November 19, 2006 Mine is OK.... Link to post Share on other sites More sharing options...
markowich Posted November 19, 2006 Author Share #5 Posted November 19, 2006 Mine is OK.... did you try 2500iso, exposure > 1/50 sec? this is when it appears, peter Link to post Share on other sites More sharing options...
marknorton Posted November 19, 2006 Share #6 Posted November 19, 2006 Yes, just tried it... Link to post Share on other sites More sharing options...
markowich Posted November 19, 2006 Author Share #7 Posted November 19, 2006 Advertisement (gone after registration) Yes, just tried it... ok, my tough luck...but i advise to everybody to check... peter Link to post Share on other sites More sharing options...
adan Posted November 19, 2006 Share #8 Posted November 19, 2006 In my test JPEGs with sample cameras at ISO 2500 I occasionally saw a similar vertical line. white rather than blue (they were B&W jpegs) and on the right-center of the frame (as I recall) Never seemed to appear in DNG - but as with magenta things, maybe if I go back and look for it it will be there. I'll repost once I check. Mark Norton theorized the horizontal banding problem is a readout fault. Perhaps this is a different manifestation of poor sensor reading - the camera 'burps' when figuring out which voltage packet belongs to which pixel(s). In which case it may not really be a sensor fault, but a fault in the timing or other circuits downstream. It may be the "fifth fault" Leica says they have identified - and maybe we'll learn more tomorrow. Assuming 1-4 are: banding, IR, green blobs, and the color profiling. Link to post Share on other sites More sharing options...
alexr Posted November 19, 2006 Share #9 Posted November 19, 2006 good job they found it before the users, then. Link to post Share on other sites More sharing options...
marknorton Posted November 19, 2006 Share #10 Posted November 19, 2006 Poor AWB (or should that be poor WB?) needs adding to the list... Link to post Share on other sites More sharing options...
markowich Posted November 19, 2006 Author Share #11 Posted November 19, 2006 In my test JPEGs with sample cameras at ISO 2500 I occasionally saw a similar vertical line. white rather than blue (they were B&W jpegs) and on the right-center of the frame (as I recall) Never seemed to appear in DNG - but as with magenta things, maybe if I go back and look for it it will be there. I'll repost once I check. Mark Norton theorized the horizontal banding problem is a readout fault. Perhaps this is a different manifestation of poor sensor reading - the camera 'burps' when figuring out which voltage packet belongs to which pixel(s). In which case it may not really be a sensor fault, but a fault in the timing or other circuits downstream. It may be the "fifth fault" Leica says they have identified - and maybe we'll learn more tomorrow. Assuming 1-4 are: banding, IR, green blobs, and the color profiling. as much as i want to support leica, this is beyond my threshold. i am used to be a beta-tester with my early acquisitions of nikons and leaf backs, but i definitely i do not want to be a delta tester. back to whoever made it. peter Link to post Share on other sites More sharing options...
strick Posted November 19, 2006 Share #12 Posted November 19, 2006 No problem. Especially together with horizontal banding, the vertical line gives your photos an interesting experimental, even Mondrianesque touch Greg (sorry for being cynical) Link to post Share on other sites More sharing options...
markowich Posted November 19, 2006 Author Share #13 Posted November 19, 2006 No problem. Especially together with horizontal banding, the vertical line gives your photos an interesting experimental, even Mondrianesque touch Greg (sorry for being cynical) hi greg, actually, with the magenta shift on top of everything one can do abstract lavender fields which van gogh could not even dream about. but probably it is only my camera since the famous early reviews did not realize those issues. peter Link to post Share on other sites More sharing options...
bono0272 Posted November 20, 2006 Share #14 Posted November 20, 2006 The DMR users also had the simlar problem and discussed in the forum months ago. There is also sometimes (not every photos) a white or blue line appears on the pictures the same position. I had my DMR replaced by the local sole agent and the situation has been improved, but sometimes there is still a line appear, and I notice that it happens under high interferance conditions, such as next to a mobile phone, or TV receiver, etc. Link to post Share on other sites More sharing options...
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