Sharp bands on negs

[aesop]

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If the lines stop at the edge of the frame, it would be impossible for a lab to cause this. Just look carefully at the shutter as suggested.

 

 

...the steps I recommended are not lab-specific, AlanG. Think "control".

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[AlanG]

...the steps I recommended are not lab-specific, AlanG. Think "control".

 

The OP said the lines did not extend past the frame.

 

I'm not trying to put down other suggestions but this isn't exactly a new phenomenon. If the fogging does not go to the edge of the frame it had to be made in the camera and almost certainly while rewinding... as he said the lens cap was off. What caused the shutter to have a small slit open for that one roll was most likely the strain of pushing the advance lever against the end of the roll. I don't believe there is any other possibility.

 

The OP could hold the camera against a bright light with the lens removed. Then wind the shutter part way and by keeping a thumb on the film advance roller (the one that engages the sprockets) see if added pressure on the advance lever pulls the shutter open very very slightly.

[aesop]

The OP said the lines did not extend past the frame.

 

I'm not trying to put down other suggestions but this isn't exactly a new phenomenon. If the fogging does not go to the edge of the frame it had to be made in the camera and almost certainly while rewinding... as he said the lens cap was off. What caused the shutter to have a small slit open for that one roll was most likely the strain of pushing the advance lever against the end of the roll. I don't believe there is any other possibility.

 

The OP could hold the camera against a bright light with the lens removed. Then wind the shutter part way and by keeping a thumb on the film advance roller (the one that engages the sprockets) see if added pressure on the advance lever pulls the shutter open very very slightly.

 

..."The lines do not extend past the frame." (post #12). Totally missed that, AlanG - I rest. Mea culpa.

[adan]

Mmmm - Alan.

 

It is the film that is taking the strain of trying to squeeze in one last shot, not the shutter. It's like having a boat tied up with two ropes side-by-side, a short one (film) and a longer one (shutter). If the tide pulls the short rope taut, the longer one will still just hang there with no strain on it (except the small pull of gravity that makes it hang )

 

In other words, a half-cocked shutter is under the same strain (or lack of it) whether it is half-cocked in the middle of the roll, or because the film won't let the cocking mechanism move further.

 

If that were not the case, a whole lot of double-stroke M3 users would have the same fog lines as the OP.

 

I agree that if the lines only cover the frame area, then a gap in the shutter is a likely suspect. I just question the mechanism you suggest.

[earleygallery]

I'm sure I've seen this before.

 

Just to clarify, if you wind on past exposure 36 and can only half cock/wind the shutter because the film has reached the end, you are leaving the shutter half cocked and the 'join' between the curtains somewhere in the middle of the film gate.

 

I know it shouldn't leak, but I recall someone else here having the same problem, although the shutter was otherwise working correctly.It just leaked a little when half cocked.

 

As already suggested, half cock the shutter and look at it with a bright light on the other side, or 'expose' a frame like that with the lens removed. I doubt it's a leak from elsewhere due to the pattern and location, and that it only appears within the film frame.