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Author Topic: Extreme streaking  (Read 3108 times)

Pete_R

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Extreme streaking
« on: September 04, 2011, 05:01:22 PM »
No, not a new sport, 'ave a look at this.



A long story which I'll cut short. My theory is the film was doubled up and was in the spiral emulsion to emulsion - caused by me winding the rewind crank on the camera the wrong way when taking up the slack and actually winding the film back on itself (new camera, brain not engaged). The camera jammed half way through the film and you can see the last frame I took, a clear bit of film then this streaking starts where there is a kink in the film. I'm just surprised it loaded into the spiral like that without me feeling a problem.


Edit: I've had second thoughts about this. I'm sure the film was loaded in the spiral correctly. I don't see how it could not be as the end of the film was still attached to the spool and the film couldn't have been doubled back on itself.

So I'm confused.
« Last Edit: September 04, 2011, 05:07:47 PM by Peter R »
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Francois

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Re: Extreme streaking
« Reply #1 on: September 04, 2011, 06:50:42 PM »
I must admit this is very weird... I've never seen anything like it before...
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Francois

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Photo_Utopia

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Re: Extreme streaking
« Reply #2 on: September 04, 2011, 07:02:44 PM »
I've seen it many hundreds if not thousands of times as a lab owner. It's called stress or strain fogging and is normally caused by rewinding the film in the wrong direction, left handed people can do this.
You can do this deliberately as i did here to prove a point by folding the film before processing.

The fold viewed at an angle to show where I folded the film:


Mark
« Last Edit: September 04, 2011, 07:11:44 PM by Photo_Utopia »
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Pete_R

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Re: Extreme streaking
« Reply #3 on: September 04, 2011, 08:44:54 PM »
Well that certainly ties in with what I did so I guess that's what it is. A long time ago I did come across stress fogging with TMAX 400 in a Mamiya 645 back where the film gets pulled around some very small rollers. But it wasn't quite like this so I never thought about it being that.

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Nick Moys

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Re: Extreme streaking
« Reply #4 on: September 04, 2011, 10:01:11 PM »
Peter

May be unrelated issue, but this article about the Horizon 202 discusses 'banding' problems.

http://cameras.alfredklomp.com/horizon202/

Nick
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Pete_R

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Re: Extreme streaking
« Reply #5 on: September 04, 2011, 10:09:56 PM »
Yes, the 202 can have banding problems due to uneven exposure - though that hasn't shown up yet on the two films I've put through it. But the streaking here was on unexposed film.
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moominsean

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Re: Extreme streaking
« Reply #6 on: September 04, 2011, 10:32:32 PM »
Aw man, very disappointed with this thread!
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Ed Wenn

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Re: Extreme streaking
« Reply #7 on: September 05, 2011, 10:31:40 PM »
....me too.

 ;D ;D
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Francois

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Re: Extreme streaking
« Reply #8 on: September 05, 2011, 10:45:50 PM »
Maybe I should get my streaking camera back out again :)
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Francois

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Jack Johnson

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Re: Extreme streaking
« Reply #9 on: September 06, 2011, 01:02:53 AM »
Quote from: moominsean on September 04, 2011, 10:32:32 PM
Aw man, very disappointed with this thread!

Distance, temperature, or number of viewers: pick your extreme!
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Nigel

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Re: Extreme streaking
« Reply #10 on: September 06, 2011, 08:09:55 AM »
Quote
Yes, the 202 can have banding problems due to uneven exposure - though that hasn't shown up yet on the two films I've put through it. But the streaking here was on unexposed film.

I get the banding, of which you speak, on my Horizont (kindly donated by Terry). I know it really bothers some people but I don't mind it.

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Pete_R

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Re: Extreme streaking
« Reply #11 on: September 06, 2011, 09:38:34 AM »
Apparently, it's not too difficult to remove the front cover and clean the gears which should get rid of the banding. I haven't popped to cover off mine yet but no doubt I will in due course even though it appears to be OK in that respect.
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jojonas~

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Re: Extreme streaking
« Reply #12 on: September 06, 2011, 12:29:36 PM »
haha, you guys! the sean, ed & franco mischief brothers? ;)

PU: thanks, that explains some weird marks I've got :)

I've been into the bending business awhile myself. I sometimes like the effect of crumbled film but it's hardly easy to calculate results. I can't find any severe scanned but here's an example of violence in the dark (reels not dry enough). you can see the white half circle on the curtain where the film bended on this frame.



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