Charles Morgan Posted September 25, 2020 Share #1  Posted September 25, 2020 (edited) Advertisement (gone after registration) Just got a rare colour film back and alas, my lovely M2 has developed an issue, which looks to be a light leak from the rear (hence colour cast). It might be time for a CLA but I'm intrigued at what the source of the leak might be. (I also wish it had affected one of my cheapo B&W rolls first rather than Fuji Superia!)   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 September 25, 2020 by Charles Morgan 1 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/313657-m2-light-leaks-thoughts-on-source/?do=findComment&comment=4052091'>More sharing options...
Advertisement Posted September 25, 2020 Posted September 25, 2020 Hi Charles Morgan, Take a look here M2 Light leaks - thoughts on source?. I'm sure you'll find what you were looking for!
jerzy Posted September 25, 2020 Share #2  Posted September 25, 2020 A bit unusual for the light leak. Can film processing be excluded? Is there any pattern in which frames are affected? Is Perforation affected? Might be good to use ERC for the next roll, there is slight chance that if light leak than through backdoor Link to post Share on other sites More sharing options...
Charles Morgan Posted September 25, 2020 Author Share #3 Â Posted September 25, 2020 Thanks Jerzy - first it starts about one third of the way through the roll. The light leak is in the same position on each landscape photo, but does not appear on vertical photos at all. It goes the full width of the frame, including the perforation. I haven't used this processor before, but I have a black and white test roll I'll develop tomorrow. I'm not sure what you mean with ERC though! Â Link to post Share on other sites More sharing options...
jerzy Posted September 25, 2020 Share #4  Posted September 25, 2020 With ERC I mean ever ready case. If it goes through Perforation than it is from back door or somewhere in film chamber. But I am fully confused with horizontal and vertical - no clue. Rarely there is a problem with backdoor producing similar light leak, but I know it from M4 only. Anyhow, tomorrow I will send you some instructions, maybe it will work here as well. Link to post Share on other sites More sharing options...
Charles Morgan Posted September 25, 2020 Author Share #5  Posted September 25, 2020 (edited) By Vertical I mean where I've changed to portrait orientation, so held the camera vertical to take the photo. In this case the backdoor would be shaded by my body. I haven't an ever ready case for the M2, but I have a few others that could substitute.   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 September 25, 2020 by Charles Morgan 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/313657-m2-light-leaks-thoughts-on-source/?do=findComment&comment=4052208'>More sharing options...
adan Posted September 26, 2020 Share #6 Â Posted September 26, 2020 Does your M2 have a self-timer installed? Link to post Share on other sites More sharing options...
Charles Morgan Posted September 26, 2020 Author Share #7 Â Posted September 26, 2020 Advertisement (gone after registration) It does. Link to post Share on other sites More sharing options...
jerzy Posted September 26, 2020 Share #8  Posted September 26, 2020 this is a valid question adan, it could be as well from the front. However more probable is that is comes from the back and let us concentrate now on this. Backdoor has following lightseals: on top (fabric) and on both sides (velvet). 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! more often the upper one (fabric) is damaged. It is not easy to determine if the seals are the cause therefore following excercise: - after loading film put electrical tape on the top as shown, shoot some photos trying to reproduce situations when problem occurs. make notes which exposures they are - put the tape on the sides as well and some shots again And now to the rare problem observed with M4. Problem is caused by unsufficiently sealed pins on backdoor, on the right side. Light come in there, goes through the long hole and is reflected where the blue arrow shows Pls post the scan of the affected negative where perforation is seen as well, this problem is causing unique pattern General remark - when discussing light leaks it is better to post scans with perforation, it makes the analysis easier jerzy Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! more often the upper one (fabric) is damaged. It is not easy to determine if the seals are the cause therefore following excercise: - after loading film put electrical tape on the top as shown, shoot some photos trying to reproduce situations when problem occurs. make notes which exposures they are - put the tape on the sides as well and some shots again And now to the rare problem observed with M4. Problem is caused by unsufficiently sealed pins on backdoor, on the right side. Light come in there, goes through the long hole and is reflected where the blue arrow shows Pls post the scan of the affected negative where perforation is seen as well, this problem is causing unique pattern General remark - when discussing light leaks it is better to post scans with perforation, it makes the analysis easier jerzy ' data-webShareUrl='https://www.l-camera-forum.com/topic/313657-m2-light-leaks-thoughts-on-source/?do=findComment&comment=4052407'>More sharing options...
Charles Morgan Posted September 26, 2020 Author Share #9 Â Posted September 26, 2020 Thanks very much Jerzy - I'll try that when I have the opportunity. Noted also on perforations! Â Â Â Â Link to post Share on other sites More sharing options...
adan Posted September 26, 2020 Share #10 Â Posted September 26, 2020 8 hours ago, jerzy said: this is a valid question adan, it could be as well from the front. However more probable is that is comes from the back..... Yes - the orange color of the light leak almost always means the film is being fogged through the plastic backing (and anti-halation coating) of the film, from behind. I was just covering all the bases since the only leak of this shape I ever had was from a self-timerless M4-2, where the light was getting in around a poorly-fitting "R" lever on the top front. I agree the ends of the rear door (poor fit or worn seals) are the most likely suspects. Link to post Share on other sites More sharing options...
250swb Posted September 26, 2020 Share #11  Posted September 26, 2020 (edited) Given the image is projected upside down it should be possible to place a negative strip back into the camera with the flare marked with a marker and work out if the flare was made either before the film gate, during exposure at the film gate, or post exposure after the film gate. If the flare doesn't line up with the the ends of the back door at any point during film transport the ends of the door should be able to be ruled out, no? So that leaves something leaking in the middle in the film gate area? Edited September 26, 2020 by 250swb Link to post Share on other sites More sharing options...
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