Gavbo Posted February 12, 2017 Share #1 Posted February 12, 2017 (edited) Advertisement (gone after registration) Just acquired an m9-p, went to check the condition of the ccd and possible corrosion, took a few shots at a wall at f16, long exp and noticed a faint vertical line smackdown the middle, wonder if anyone seen this before? Unfortunately taking to Leica is not too convenient so I thought I check with the experts first. 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! Edited February 12, 2017 by Gavbo 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/269281-ccd-issue/?do=findComment&comment=3210751'>More sharing options...
Advertisement Posted February 12, 2017 Posted February 12, 2017 Hi Gavbo, Take a look here CCD issue?. I'm sure you'll find what you were looking for!
Robert M Poole Posted February 12, 2017 Share #2 Posted February 12, 2017 (edited) Looks to be corrosion. Black dots with white halos. Maybe also a line of dead pixels. If you email Leica the images they should be able to confirm though. www.robertpoolephotography.com Edited February 12, 2017 by Robert M Poole Quote Link to post Share on other sites More sharing options...
oronet commander Posted February 12, 2017 Share #3 Posted February 12, 2017 The crab-like dots with white halos are unmistakable: sensor corrosion. Quote Link to post Share on other sites More sharing options...
pop Posted February 12, 2017 Share #4 Posted February 12, 2017 In addition to the small specks caused by sensor corrosion there is indeed a line running along the middle of the frame. It appears that the left half of the image is a tiny bit darker than the right half. However, that's difficult to say, because the sample image is heaviliy compressed; we also don't know how the image was processed in PP. If the contrast of the image was much increased, small irregularities in the sensor are much exaggerated and could possibly lead to the line shown here. Since the sensor is corroding, sending the camera to Leica for replacement of the sensor seems to be the obvious thing to do. When posting here again, I recommend proper scaling and compression of the image before uploading to the forum: Why does the forum shrink my photos and adds ugly artifacts? Quote Link to post Share on other sites More sharing options...
Lord Lucan Posted February 13, 2017 Share #5 Posted February 13, 2017 I agree with advice given by Robert,oronet and pop. The second photo looks to be "sky at night." Quote Link to post Share on other sites More sharing options...
pixelstrata Posted March 10, 2017 Share #6 Posted March 10, 2017 How can I replicate this test to check my M9 CCD? M9 bought 2nd hand and Leica customer care say the sensor has not been replaced - at least a rep at Leica customer care Shanghai told me that from checking computer records. If no visible sign or impression of corrosion should I just carry on - shoot away happily until any corrosion does show up or send to Leica? I guess they do NOT replace if there isn't corrosion or would they replace anyway? Thanks! Quote Link to post Share on other sites More sharing options...
jaapv Posted March 10, 2017 Share #7 Posted March 10, 2017 Advertisement (gone after registration) Just go and shoot it... Leica won't fix what ain't broken. Chances are that you will never have corrosion on the sensor. Quote Link to post Share on other sites More sharing options...
pixelstrata Posted March 10, 2017 Share #8 Posted March 10, 2017 Yep, that's my inclination to just shoot and enjoy! Fingers crossed and hopefully IF it shows up it's before Leica suspend their replacement offer.. So to test the sensor - shoot f16 at the sky or white wall? Quote Link to post Share on other sites More sharing options...
jaapv Posted March 10, 2017 Share #9 Posted March 10, 2017 White wall or sky, it does not matter, and defocus and keep the camera moving during exposure Quote Link to post Share on other sites More sharing options...
pixelstrata Posted March 10, 2017 Share #10 Posted March 10, 2017 (edited) Not looking good. Took a picture on white wall long exposure at f16. Couldn't really see anything with naked eye but looking closely at full screen I saw a couple of dots. Zoomed in 100% crop I see a dark centre and greyish halo. When inverted it's clearer but not easy to say any 'halo' . Couldn't figure out how to add inline images. Add in a gallery below. There are other marks across the image but they could easily be dust spots. Edited March 10, 2017 by pixelstrata Quote Link to post Share on other sites More sharing options...
pixelstrata Posted March 11, 2017 Share #11 Posted March 11, 2017 (edited) OK. Probably I did not conduct the test effectively. Today instead of long exposure on off white wall indoors I shot outdoors at f16, 8s against the sky while moving camera. Also cleaned the lens as there was dust on it And then replicated Gavbo's Lightroom test. When 'visualize spots' is selected and on maximum I see only black across the image. The non visualized image also seems to have no marks or blemishes. See attached. Images show last night indoors wall test and today outdoor sky test. Safe to say no corrosion? 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! Edited March 11, 2017 by pixelstrata 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/269281-ccd-issue/?do=findComment&comment=3231160'>More sharing options...
Gavbo Posted April 26, 2017 Author Share #12 Posted April 26, 2017 pixelstrata If the speak's edge are clearly defined then most likely is dirt, i used lightroom to show the line running down the middle of the shot. Noticed you are from Shanghai, WeChat me on gavinho007 if you still have doubts. OK. Probably I did not conduct the test effectively. Today instead of long exposure on off white wall indoors I shot outdoors at f16, 8s against the sky while moving camera. Also cleaned the lens as there was dust on it And then replicated Gavbo's Lightroom test. When 'visualize spots' is selected and on maximum I see only black across the image. The non visualized image also seems to have no marks or blemishes. See attached. Images show last night indoors wall test and today outdoor sky test. Safe to say no corrosion? Quote Link to post Share on other sites More sharing options...
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