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jaenet guggenheim
shooting welding
on Mar 18, 2009 at 5:03:04 pm

i will be shooting a doc on a sculptor as he creates a sculpture. there will be significant welding involved.

how can i shoot welding and protect my camera's ccds or whatever it is inside there? are there filters or gels or something else?

thanks,
jaenet


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Matthew Romanis
Re: shooting welding
on Mar 18, 2009 at 9:39:06 pm

A trick I have used in the past is to use two polarising filters, and rotate one against the other. It acts like an infinitely variable ND.
Most small scale welding though won't effect the camera that much, just use the on board ND filters, and if you can, set the gain to the lowest negative setting. The worst thing to happen with using a CCD camera is that you may get a vertical smear line at the point of the weld.



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jaenet guggenheim
Re: shooting welding
on Mar 19, 2009 at 1:44:02 am

wow,

thank you for the suggestions! i have one polarizing filter and can get a second. i know what you mean about setting them at 90 degrees to each other. or something close.

but there wasn't a burn out problem with the chips inside the camera? i was warned there would be, when i was shooting a different welder with my canon rebel (still camera). but that was after the fact. so if i blew out stuff, i blew out stuff.

jaenet



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Matthew Romanis
Re: shooting welding
on Mar 19, 2009 at 5:22:08 am

You'll have to be careful about how intense the arc is. You don't want to be exposing for the ambient light in the room and be fully exposed to the arc when it gets going. Use some foreground or something to break up the intense light.
I have seen some older CCD's suffer form pixel burn out when exposed to high intensity lasers, a welding arc is just as intense so some care is always warranted.



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jaenet guggenheim
Re: shooting welding
on Mar 19, 2009 at 2:31:41 pm

thanks for the foreground tip! i hadn't thought of that! and yes, no auto exposure for these shots. anything else i should be thinking about?

thanks again so very very much for all your help!!!

jaenet




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Matthew Romanis
Re: shooting welding
on Mar 20, 2009 at 6:34:16 am

Not really, just be prepared to think laterally on the day.



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James Mulryan
Re: shooting welding
on Mar 20, 2009 at 4:26:40 pm

Have shot lots of welding shots, no problems with ccds.
Once fried a 10000 block with a laser.

James Mulryan
Sunset Park Media, LLC
Santa Monica, CA
info@jamesmulryan.com


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