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Light leak in magazine Arri 2c

arri 2c magazine light leak

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#1 Phillip Mosness

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Posted 02 January 2018 - 07:57 PM

I'm thinking one of my Arri 2c magazines has a leak since some footage has come back throbbing. 

 Is there a method for testing this?

Like closing a little light inside it and see if you can detect any light coming through in a dark room?

Thanks!

 


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#2 James Compton

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Posted 02 January 2018 - 08:31 PM

I had a similar issue with an ARRI IIC, years ago. I taped the magazine door shut with camera film roll tape (like always) and the problem stopped with that mag until the seals were repaired. Do you have a DSLR? Take a tiny battery powered LED and seal it inside the mag. Take the mag and your DSLR(and a tripod) into a darkroom. Shoot a Long exposure, (pointed at the mag) of about 2-5 seconds with the light on inside the mag in the darkroom. If there is a leak, it should look like a comet streaking through the darkroom.


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#3 Phillip Mosness

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Posted 03 January 2018 - 01:55 AM

Thanks, James I'll give that a shot. 

It's a little disconcerting because I did actually tape the door, as I usually do. The door seems like the only place that it could happen, though. 

The distortion in the image is even across the frame and pulsates more quickly as the roll runs out, telling me that it got hit somehow from one side all the way to the core. 

I almost wonder if it's radiation?


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#4 Frank Wylie

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Posted 07 March 2018 - 01:53 PM

If you have a light leak in the mag and don't tape it immediately after loading, it could have fogged a wedge of the film over time. 

 

Being that the fogging pulsates more rapidly as you approach the center of the load, it suggests that the film was fogged "in situ", not as it was running through the camera...


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