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Reliable Method for calculating ASA on Varricam??


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#1 Antonio Scarlata

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Posted 09 December 2005 - 07:46 PM

Hey yall....

Shooting a commercial on the Varricam with the P+S Mount and some zeiss superspeed primes. I feel pretty comfortable with our HD monitor and zebras but I do prefer to meter. I hear a lot of different numbers thrown out and I wanted to find away to get my own ASA approximation with the settings I have and a possibly changing Dynamic Level. ps. just me and my meter. No vectorscope available
Also, anybody know if the P+S adapter needs to be turned off during White Shading setting?
Did I already mention we're shooting tomorrow? mmmmm.

Thanks a million
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#2 Jeremy

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Posted 10 December 2005 - 11:01 PM

It depends on the settings of the camera. ASA could typically range from 640 to 320. It just depends on how it's configured. The best thing to figure out the ASA is just to light to something so that it looks best on the monitor, note the F-Stop and then adjust the ASA on your light meter so that it corresponds. This should be fairly accurate.

You can just light by eye once you get the hang of it. Just get a big monitor!
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#3 Chris Keth

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Posted 10 December 2005 - 11:47 PM

It depends on the settings of the camera. ASA could typically range from 640 to 320. It just depends on how it's configured. The best thing to figure out the ASA is just to light to something so that it looks best on the monitor, note the F-Stop and then adjust the ASA on your light meter so that it corresponds. This should be fairly accurate.

You can just light by eye once you get the hang of it. Just get a big monitor!


Assuming it can be figured out like standard def stuff, you set the zebra stripes to 70 IRE and frame a greycard in scene. Adjust your stop so that the greycard is all in stripes. Then just set your meter to the appropriate shutter speed and stop and figure out the corresponding EI for the camera and settings.
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#4 Antonio Scarlata

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Posted 11 December 2005 - 07:33 AM

Thanks a lot fellas, it's workin out great. Appreciate the help.
Scarlata
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