is this caused by a leak ...

P

paulfish4570

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in my R2m or something else? showed up on a few negs of my latest roll. here are three examples:

img383rffsample.jpg


img372rffsample.jpg


img368rffsample.jpg
 
That's really unusual ... it looks like a shutter leak but I didn't think these copal style shutters did that!
 
there looks to be some streaks associated down the left side of the 1st image too.
 
If you see it on more than 1 roll, yes, Paul (had the same thing once with one of my OMs. Replacing the door seals fixed it).
 
four negs affected: 1, 5, 9 and 14. so strange.
ok, if it's a door seal leak, it is occurring at the bottom right side, correct? i think i flip-flopped the image correctly. if it is top left on a horizontal negative/print, then it was exposed bottom right ...
 
paulfish4570 said:
four negs affected: 1, 5, 9 and 14. so strange.
ok, if it's a door seal leak, it is occurring at the bottom right side, correct? i think i flip-flopped the image correctly. if it is top left on a horizontal negative/print, then it was exposed bottom right ...
Click to expand...

Paul, I'm guessing, but the mark is in the same position on four negatives that are all four (well, one is five) frames apart. It suggests to me that something might have happened while the film was rolled up, but not in the film cartridge. Do you do your own developing? Could it possibly be associated with the spacing of the frames on the spool, such that some light or mechanical damage caused it during the loading of the film into the tank?

I can't quite think what that might be, but the spacing intrigues me.
 
Leigh, i have considered that. i use a standard one-reel paterson tank and paterson reel, and i twist agitate. for the life of me, i cannot figure how a tiny leak of some kind could occur and only get those negs; same with something mechanical; the arrowheads are so precisely placed ...
 
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I wanted to say that it looks like a pinhole, but I think the R2M uses metal(?) shutter curtains. Perhaps there is a kink on either the front or rear curtain, allowing light to leak through. If this is true, the intensity of the problem should be much less when shots are taken quickly successively.
 
Try running a roll of color film through and see if the leak looks white or orange? That could let you know if it was coming from the front or from the back.
 
paulfish4570 said:
Leigh, i have considered that. i use a standard one-reel paterson tank and paterson reel, and i twist agitate. for the life of me, i cannot figure how a tiny leak of some kind could occur and only get those negs; same with something mechanical; the arrowheads are so precisely placed ...
Click to expand...

Yep, I use the same - mine's a two-reel - so I understand what you're saying. If it's the shutter it should be happening on every frame. If it's a light leak through the back door then it's a possibility. I have heard of situations where there was enough compression/deterioration of the felt seal material that movement of the door was possible and if pressure was exerted in particular places at times it would allow a crack of light to penetrate. (That relates to cameras in general - not to the Voigtlanders particularly).
Also, if the R2 body has the same little window as my R3/4 bodies in the back to allow you to see what film you have loaded then I'd also check to make sure there was no possibility of a leak from that source penetrating through to the film gate.
And, just to drive you to distraction, don't rule out a manufacturing fault in the film. Rare, but not unheard of. Maybe rule that out by running another film through first?
 
OK, I'll take some wild guesses.

Same position on the frame... That means it happened with the film positioned on frame boundaries. In the camera is the obvious place. Also, when the film is manufactured; could it be bad film? In camera feels more likely.

I last saw an artifact like this years ago and it was a reflection within the camera. It would come and go depending on f-stop because the source was illuminated more when wide open. Look carefully inside the back of your camera with the lens wide open.

If you can't see anything, do a test roll to see if the spot is dependent on f-stop or shutter speed.

Good luck. Let us know when you find it
 
I had something like that on a Zenit C from a loose strap lug. It was intermittent, presumably based on how much stress I was putting on the lug (I had a wrist strap attached to it.), the brightness of the sunlight, or how much time there was between shots.
 
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