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Red streaks on film
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paulofessel View Drop Down
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Posts: 866 		Post Options Post Options   Quote paulofessel Quote  Post ReplyReply Direct Link To This Post Topic: Red streaks on film
    Posted: 03 February 2012 at 11:16
I've took my Maxxum 7 on travel and I'm getting this:



I suspect it is a light leak, but the problem does not happen all the time. I've got a film where the first 26 frames had no problems, while one other had problems in almost every frame. Any ideas?
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artuk View Drop Down
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Posts: 2352 		Post Options Post Options   Quote artuk Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2012 at 11:23
Could be the lab. I have had a couple of films with very fine 3 colour lines on some of the prints (red, green, blue) but could only assume it happened during processing. Your's looks a little like the result of a light leak, but if it is not happening all the time, and it's not near the edges of the film (where light would leak into the camera) it may have happened when the film was being developed.
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Posts: 127 		Post Options Post Options   Quote BUNS Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2012 at 11:30
Does it appear in the same place on every frame affected?
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Bob J View Drop Down
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Posts: 15471 		Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2012 at 11:55
From the position on the frame, I would check the light seal around the door that allows you to see what film is loaded. (probably the top part of it).

If you suspect this might be the case, shoot part of the next film as is, but then cover the door with electrical insulating tape... if the problem occur on all frames, that is not the cause...
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Bob J View Drop Down
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Posts: 15471 		Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2012 at 11:58
...sorry, what am I thinking, I wasn't allowing for the orientation of the film - might well be from the window, but only appear where the film is in place for some time (ie when you shoot continuous, the second shot does not show the streak).
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paulofessel View Drop Down
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Posts: 866 		Post Options Post Options   Quote paulofessel Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2012 at 12:30
Originally posted by BUNS BUNS wrote:

Does it appear in the same place on every frame affected?


Yes. Always in the same position with different degrees of intensity.
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paulofessel View Drop Down
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Posts: 866 		Post Options Post Options   Quote paulofessel Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2012 at 12:31
Originally posted by artuk artuk wrote:

Could be the lab. I have had a couple of films with very fine 3 colour lines on some of the prints (red, green, blue) but could only assume it happened during processing. Your's looks a little like the result of a light leak, but if it is not happening all the time, and it's not near the edges of the film (where light would leak into the camera) it may have happened when the film was being developed.


I don't think it's the lab, since I've also took my X-700 in the same trip. Rolls from both cameras were developed in the same lab and only the rolls shot with Maxxum 7 show the problem.
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paulofessel View Drop Down
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Posts: 866 		Post Options Post Options   Quote paulofessel Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2012 at 12:36
Originally posted by Bob J Bob J wrote:

...sorry, what am I thinking, I wasn't allowing for the orientation of the film - might well be from the window, but only appear where the film is in place for some time (ie when you shoot continuous, the second shot does not show the streak).


Actually, I've not shot the roll which had no problems for the first 26 frames continuously. I was always walking around with the camera, so I took some shots every once in a while. Should then I cover the film window with isolant tape?
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Posts: 15471 		Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2012 at 12:47
Perhaps have a look when the back is open to see if the seal might be compromised - if the light-leak is slight, it might only affect when the film has been exposed for a number of hours, or to strong light. Covering the window means you lose out confirming what film you have loaded, but if you keep the ISO as chosen by DX coding and have the counter going backwards, that is not too much of a loss.

I think I'd try two strips of black insulating tape one over the other, the little ledge beside the window should stop them getting peeled back by accident.
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BobSo View Drop Down
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Posts: 863 		Post Options Post Options   Quote BobSo Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2012 at 13:19
Have you looked at the negatives?
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paulofessel View Drop Down
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Posts: 866 		Post Options Post Options   Quote paulofessel Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2012 at 14:13
Originally posted by BobSo BobSo wrote:

Have you looked at the negatives?


Yes, and the streaks are there. This is a scan of the negative made on a Dimage Elite II scanner.
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