Author Topic: Is this a processing fault?  (Read 1579 times)

Pete_R

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Is this a processing fault?
« on: April 12, 2009, 01:55:31 PM »


The middle one of these three negs has a distinct line down the middle and appears to have more exposure one side than the other. The three negs were all taken within minutes of each other. The first two with the same lens (28mm) and the third with a different lens (40mm). Camera was a Minolta CLE with horizontally running shutter.

I'm thinking this is probably a shutter fault, though why it's only happened on one neg I don't know. It correlates with the second curtain hesitating during it's travel. But I wondered if anything else might cause the same result. I'm thinking maybe the end of the film was resting against this neg during processing (these were first three negs on roll).

Any thoughts?
"I've been loading films into spirals for so many years I can almost do it with my eyes shut."

gothamtomato

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Re: Is this a processing fault?
« Reply #1 on: April 12, 2009, 02:28:59 PM »
I think that if the end was resting there the mark would be darker, rather than lighter. I'm not sure.
But I think that Ilford may have a technical department that could answer your question. That might be the best bet. (Kodak used to have a department like that, that could answer the most obscure technical questions).

Francois

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Re: Is this a processing fault?
« Reply #2 on: April 12, 2009, 05:32:11 PM »
It could be a shutter issue. On my screen, it seems like the band is somewhat rectangular and quite even. It  could be caused by a speck of something going through the gears for a split second.

For development to be the issue, the start of the film would have to be loaded first so it is near the spindle. Then, maybe a development issue... but I doubt it.

I also doubt it could be a light leak since it's too even.
Francois

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Pete_R

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Re: Is this a processing fault?
« Reply #3 on: April 13, 2009, 05:52:39 PM »
It  could be caused by a speck of something going through the gears for a split second.

That's what I was thinking/hoping. I've since put another film through the camera with no evidence of any problems so I'm keeping my fingers crossed. I suppose I shouldn't complain if a 20+ year old camera has the odd hiccup.
"I've been loading films into spirals for so many years I can almost do it with my eyes shut."

Andrea.

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Re: Is this a processing fault?
« Reply #4 on: April 14, 2009, 10:39:59 PM »
Is it where the end of the film maybe touched the other part of the film on the reel during developing. I have had that wif 120 film.

Francois

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Re: Is this a processing fault?
« Reply #5 on: April 15, 2009, 02:55:58 PM »
It's on frame 2. Unless a very long leader has been left on the film, I doubt it. If the starting frames are on the exterior of the reel, the problem would probably have been on a much higher frame number (large circumference). If the film on the other hand is rolled starting with the start of the frame, it most likely would be protected by the spindle at this point. If it was film touching during processing, the splotch would be uneven...
Francois

Film is the vinyl record of photography.

Pete_R

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Re: Is this a processing fault?
« Reply #6 on: April 18, 2009, 09:03:13 AM »
Is it where the end of the film maybe touched the other part of the film on the reel during developing. I have had that wif 120 film.

That's what I was orignally thinking, but now I think it was a temporary (hopefully) shutter fault.
"I've been loading films into spirals for so many years I can almost do it with my eyes shut."