goatsby Posted May 19, 2015 Share #1 Posted May 19, 2015 Advertisement (gone after registration) I know that the banding issue has been discussed in the past, but my searches have lead me to mostly high ISO concerns. This is different, and hard written into the file. Only happens at 640 and is not reproduced by trial and error. any thoughts? 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/245228-m8-banding-at-iso-640/?do=findComment&comment=2818319'>More sharing options...
Advertisement Posted May 19, 2015 Posted May 19, 2015 Hi goatsby, Take a look here M8 banding at ISO 640. I'm sure you'll find what you were looking for!
Dougg Posted May 19, 2015 Share #2 Posted May 19, 2015 Seems odd to me that your banding is only in the central horizontal zone and not in the upper or lower areas. And I regard ISO 640 to be "high ISO" for the M8. Doug Link to post Share on other sites More sharing options...
Lenshacker Posted May 19, 2015 Share #3 Posted May 19, 2015 Does it happen with a freshly charged, newer battery? Have you tried a different SD card? Does it happen with both DNG files and JPEG files? Have you tried using 14-bit Raw mode with M8Raw2DNG? The latter two would use different processing pathways through the M8. The SD cards can cause issues with interference, but this is way-up-there! Batteries can also make a difference, if they are old/weak- delivering enough power for the camera. At ISO640 the camera is internally shifting the raw values from the sensor by two bits then converting to DNG. Using JPEG- does a different process. At High ISO, I did better with JPEG. These days, I use 14-bit raw mode. Link to post Share on other sites More sharing options...
lct Posted May 19, 2015 Share #4 Posted May 19, 2015 I suspect that your shot was underexposed but i may be wrong. Would you mind to drop your dng file in a dropbox? Link to post Share on other sites More sharing options...
jaapv Posted May 19, 2015 Share #5 Posted May 19, 2015 I would say underexposed too. A nearby cellphone can trigger banding like this as well. Link to post Share on other sites More sharing options...
Lenshacker Posted May 19, 2015 Share #6 Posted May 19, 2015 My wife gets mad at me because I refuse to turn on my cell phone when out taking pictures. With Digital, I have a better excuse - RF noise. With film, was not as convincing. Link to post Share on other sites More sharing options...
goatsby Posted May 20, 2015 Author Share #7 Posted May 20, 2015 Advertisement (gone after registration) Thanks everyone for the input. To answer your questions; Does it happen with a freshly charged, newer battery? Yes. Have you tried a different SD card? Yes. Does it happen with both DNG files and JPEG files? I normally only shoot in DNG, or DNG and JPEG fine, and have seen in both file types. Have you tried using 14-bit Raw mode with M8Raw2DNG? No, I have not tried this program yet. i was also not aware of the mobile phone issue, but was not using the phone whe taking photos where this happened. My old M8 never did this, so I sent the rig to Leica NJ for a check up.. Will report back here with thier findings and repair suggestions if one is necessary. Thanks again, Adam Link to post Share on other sites More sharing options...
Jeff S Posted May 21, 2015 Share #8 Posted May 21, 2015 You didn't answer the underexposure question….did you also send NJ your file? Jeff Link to post Share on other sites More sharing options...
goatsby Posted May 21, 2015 Author Share #9 Posted May 21, 2015 As far as being underexposed, it was a little since it was dark in the room and I wanted to keep the shutter speed reasonable. But, other images were shot at the same time and do not exhibit the banding. The DNG files were sent to NJ as part of the package, hopefully it will help the, figure out what needs to be done. Also, here is the dropbox link to the DNG files.... https://www.dropbox.com/home/Leica%20M8%20banding Link to post Share on other sites More sharing options...
lct Posted May 21, 2015 Share #10 Posted May 21, 2015 Also, here is the dropbox link to the DNG files.... https://www.dropbox.com/home/Leica%20M8%20banding My dropbox says that "Leica M8 banding" does not exist. Would you mind to try again? Link to post Share on other sites More sharing options...
Lenshacker Posted May 21, 2015 Share #11 Posted May 21, 2015 It sounds like the camera has a problem in the electronics- it should not be doing this. The M8 sensor consists of two halves with separate pathways- and the banding is on both sides. So I don't think it is from the sensor itself, will look at the DNG later. Link to post Share on other sites More sharing options...
goatsby Posted May 21, 2015 Author Share #12 Posted May 21, 2015 https://www.dropbox.com/sh/lx4iu4e2ricllwk/AAAdrLf3pE3po1_FFUhKz74da?dl=0&s=sl Here is a revised link, let me know if it works. Thanks everyone for their input, Adam Link to post Share on other sites More sharing options...
Lenshacker Posted May 21, 2015 Share #13 Posted May 21, 2015 Adam- I'm looking at streaks in the image that start where there are changes from light/dark, I think the processor board in the camera has problems. You state that the problem only happens at ISO640: does it happen at ISO1250 and ISO2500? Internally, the processor board is shifting the 14-bit values that come off the sensor before compressing them to DNG-8. If something was going wrong in this operation it could cause odd results like this. You might try reloading the Firmware into the camera, worth a shot. Version 2.014 seems to be the most stable, although I have no problems with 2.024. If that changes nothing, I think it is Time to send it in for repair. Link to post Share on other sites More sharing options...
lct Posted May 21, 2015 Share #14 Posted May 21, 2015 Here is a revised link, let me know if it works. Perfectly thank you. This banding is not normal at all indeed. Never got this with my M8.2. Link to post Share on other sites More sharing options...
adan Posted May 23, 2015 Share #15 Posted May 23, 2015 Looks like the classic "Jesus stripes" to me: http://www.l-camera-forum.com/topic/107662-jesus-stripes/ (horizontal picture, horizontal stripes - vertical picture, vertical stripes) Edit - BTW, I got something similar (along with camera lockups) for a few months with an M9 as well. In that case, it was an aging M8-era battery plus a firmware problem regarding sensing battery performance. A firmware upgrade eliminated both the stripes and the camera lockups. Link to post Share on other sites More sharing options...
goatsby Posted May 23, 2015 Author Share #16 Posted May 23, 2015 Thanks for the responses and links to similar issues. What's interesting is that my camera was produced just before the M8.2, has the most recent firmware and a newish battery (<1 year old). Seems to be the opposite for the other posters from what I read. The camera is at NJ with a set of DNGs, will report back with their findings and suggested repairs. Would be nice if it was a simple firmware reload..... Adam Link to post Share on other sites More sharing options...
Loren Posted May 23, 2015 Share #17 Posted May 23, 2015 Have you tried reloading the firmware? Link to post Share on other sites More sharing options...
goatsby Posted May 23, 2015 Author Share #18 Posted May 23, 2015 Unfortunately not, it was shipped to Leica NJ before I found out to try this..... Link to post Share on other sites More sharing options...
harryjiang Posted January 8, 2016 Share #19 Posted January 8, 2016 any updates on this repair? Link to post Share on other sites More sharing options...
goatsby Posted January 8, 2016 Author Share #20 Posted January 8, 2016 Thanks for the nudge, I meant to post a reply but forgot! About two months ago the M8 sensor was still not available from Wetzlar, and there was no sensor slated to arrive so they said it may be a while, a long while. I asked Leica about an upgrade and they offered a M240 with a discount, but I asked for a Q. At first they said no since it was a completely different line, but again I strongly stated my displeasure that my camera was there for 6 months with no end in sight and the request for the Q ran up the chain. Supposedly it went all the way to the top for approval but they were able to offer me a discount on the Q for my M8. I am thankful Leica offered to do anything on a camera so old and purchased second hand. What sucks is that I only purchased the M8 a few months before so there was a loss in the deal. I am nearly sure the seller did not know, and I did not discover the flaw until after I had the camera a little while. It was kind of a losing situation that in the end Leica did me a solid by allowing the trade in and now I have, and love, the Q. Link to post Share on other sites More sharing options...
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