Joe Ferdinand Posted March 2, 2021 Share #1  Posted March 2, 2021 Advertisement (gone after registration) Hi all, I'm new here but thought someone may be able to help me. I recently bought my dream camera, a Leica m6! I've put a few rolls of film through it and discovered three black lines that appear in a bout 1 in 4 of the negatives (normal when the composition involves the sky). I presume this can't be a light leak as its black not white? I've disregarded the possibility that It's todo with the development process as I've developed the same film in the same way for over a year. Using a Olympus OM1 and had no issues. I was wondering if anyone could cast some light on this please? Its very frustrating! Many thanks, Joe    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/318518-mysterious-black-line-on-negative/?do=findComment&comment=4152207'>More sharing options...
Advertisement Posted March 2, 2021 Posted March 2, 2021 Hi Joe Ferdinand, Take a look here Mysterious black line on negative. I'm sure you'll find what you were looking for!
jerzy Posted March 2, 2021 Share #2  Posted March 2, 2021 (edited) Does it happen on fast speeds only? I mean 1/500 and 1/1000? This is known problem with screwmount when the edges of one or both curtains are not even. However with Ms edges are made of metal, so should not happen. Still there can be an obstacle in the labirynth, where one curtains overlaps the other. Check them, visually, when no film inside. Opening back door will allow you to see curtains from both sides. Edited March 2, 2021 by jerzy Link to post Share on other sites More sharing options...
jerzy Posted March 2, 2021 Share #3  Posted March 2, 2021 (edited) to visualise what I mean.. this is the edge of one of curtains of IIIf, notice hairs ragging into the slid. At 1/1000 slid with is roughly 1,2mm, if there is an obstacle which moves with the curtain it covers the begative and creates black lines. In example below there were many hairline black lines. In case of M the edge is metal one and your lines are thicker - there might be something there 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! on picture below you may see part of opening curtain and closing curtain with labirynth - check these places for any obstacles Edited March 2, 2021 by jerzy 1 Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! on picture below you may see part of opening curtain and closing curtain with labirynth - check these places for any obstacles ' data-webShareUrl='https://www.l-camera-forum.com/topic/318518-mysterious-black-line-on-negative/?do=findComment&comment=4152228'>More sharing options...
Joe Ferdinand Posted March 2, 2021 Author Share #4  Posted March 2, 2021 Hello Jerzy, Thanks SO much for your reply! It is in fact much worse when shooting at 1/500 and 1/1000. Do you think I could have anything to do with that fact that I've been using a old 1933 ltm leitz elmar with a M mount adapter? This is great information, when I finish this next roll of film I'll take a good look inside  Many thanks! Joe Link to post Share on other sites More sharing options...
jerzy Posted March 3, 2021 Share #5  Posted March 3, 2021 Joe, no, it has nothig to do with the lens. It is something what is sticking to the enge of one of the curtains. When you are so far with the film - remove the lens, open back door and inspects area where blue arrow is pointing. From both sides, I mean back (as shown here) and from the lens side. Most probably you will find at least 2 obstactles, lower one a bit thicker. If egdes are clean than you need to use your fingers to build a slid. Release shutter, wind just a bit, like below. Then gently touch the curtain with your 2 fingers from back and through the lens opening and move the curtain as arrow shows. Not much, just that you can see the egde of curtain and the labirynth. Both must be clean. Use soft gloves when touching curtain 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/318518-mysterious-black-line-on-negative/?do=findComment&comment=4152424'>More sharing options...
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