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double exposure


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#1 hoyte

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Posted 02 August 2006 - 11:00 AM

On one whole roll we had a problem with a slight double image, making the picture out of focus, so... unusable. seems like some sort of instability problem, or something with the claws/pins... Does anyone have any idea how this could have happened? or what this might be?

this roll was Black and white 7222 KODAK, the camera is an Arri SR3 advanced. Can this be a result of too small loops combined with the stiffness of the B/W stock?

Thanks,
Hoyte
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#2 John Pytlak RIP

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Posted 02 August 2006 - 12:48 PM

On one whole roll we had a problem with a slight double image, making the picture out of focus, so... unusable. seems like some sort of instability problem, or something with the claws/pins... Does anyone have any idea how this could have happened? or what this might be?

this roll was Black and white 7222 KODAK, the camera is an Arri SR3 advanced. Can this be a result of too small loops combined with the stiffness of the B/W stock?

Thanks,
Hoyte


I've seen a few cases where if the film emulsion is a bit sticky (like on the really humid days we've had lately), the film can "jump" slightly in the camera gate during exposure. As you know, some cameras need to have gate tensions and clearances optimized for B&W films, which do not have the rem-jet backing used on color negative films.

I assume you've checked to be sure you are not getting the double image due to filter reflections or other optical issues?
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#3 Hans Engstrom

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Posted 02 August 2006 - 02:02 PM

Do you have a capture from this roll? Did you use the same mag later without any problem?
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#4 Bernhard Zitz

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Posted 02 August 2006 - 05:16 PM

some weeks ago somebody described a similar problem with his NPR in a post called "HELP!?! My camera hates Kodak 7222"

in this thread you might find some answers

is 7222 more sensible to this problem than other b/w stocks?
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