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David Sekanina

light leak in scan or in camera?

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Hi

 

I got my first 16mm scan back from a Scanstation at 2K. I noticed a slight yellowish tint in the upper left corner and wondered if this was due to an uneven light during the scan, or a light leak in the camera? It's very faint and only visible on light backgrounds. Has anyone seen something similar before? Sprocket hole stress that caused discoloration?

 

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Edited by David Sekanina
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Certainly looks like it's coming from the perfs. What camera was it? Can you examine it to check if there is perhaps light leaking through the claw slot somehow? Does the film itself look bruised around the perfs? (I don't think bruising would cause such extreme discolouration, but I'm no expert in that side of things). Have you asked the scan people?

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It would be great to see it in motion to see if it changes based on the shot. It would also be nice to know what camera it is and if the guys who did the scan, can see it on the negative. 

 

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It was shot on an XTR Prod. Will upload a short clip later. Haven't asked the scanning guys yet, but it looks like the light comes from the perfs.

I've seen discoloration just under the perf on high speed cameras, running at 400 fps, where the pulldown claw stresses the perf enough, so the emulsion reacts. But this can't be that. The camera ran at 24fps buttery smooth and silent.

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My only thought is: Yes, this is the claw side of the film channel where the time code LED's are.  If the ASA (ISO) on the light meter is not set for the correct ISO of your film, the LED's may be producing an overly bright image, which could perhaps conduct through the film base (halation). Color of late-production Aaton LED matrix is yellow.  It is worth checking out, hope this helps. 

-Charles Pickel, www.seriousgear.com

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You are most welcome ! Full disclosure: David bought this nice late-production XTR Prod from me. It is a rare beauty. I hope you can pinpoint the source of this issue. Let's be in touch !

-Best, -Charles

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Here's a short clip:

It seems to come from the perf. I received another scan from a different lab  and film roll yesterday, and the light spill isn't in the new scan.

Edited by David Sekanina
clarification

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