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Circle of confusion with pstechnik


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#1 ivan marasco

ivan marasco
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Posted 02 March 2008 - 07:46 AM

hi,
i want to know how to calculate the Circle of Confusion to use with the pstechnik mini35 and the panasonic hvx200(1/3" ccd HD camera).the camera capture from the Ground glass a true 35mm depth of field but not with a 35mm format size but with a format size near a super8mm negative size.
douglas hart suggest to use with 35mm format 1/700" for big screen and 1/500" for television works.
but how to calculate the coc with this combination??
thanks
ivan
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#2 Allen Achterberg

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Posted 03 March 2008 - 05:51 AM

Ivan,

I think you are over thinking it a tad, I don't know what the circle of confusion is on a 1/3" sensor, just focus on the groundglass, lock the focus of the camcorder off, and use the circle of confusion that corresponds to the lens format you are using. use your kelly wheel, or refer to the ASC Manual for tables. I would just ignore the Camcorder once the focus was set correctly, but maybe I under think it.

my 2 cents
Allen
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