Question about DVRack gray card use at DVinfo.net

Paul Cascio · February 12th, 2008, 08:59 AM

Can someone explain how to use these properly and what the levels should be in DVRack/OnLocation? There is no black, just gray tones so I'm not sure what I should be trying for to achieve proper exposure.

Thanks

Marc Colemont · February 21st, 2008, 04:07 PM

The goal is to have the black chip of the card as low as possible on the waveform, and the white chip near 100%. That way you are exposing the maximum latitude on the camera. It should show a so called 'Stair case' on the waveform monitor.
One must say that DSCcharts are much better then the carton printed stair case which is provided with DV rack. But it does it's job too. Make sure to aviod reflexions on the card when you are shooting it.

February 12th, 2008, 08:59 AM	#1
Paul Cascio Trustee Join Date: Sep 2004 Location: Bristol, CT (Home of EPSN) Posts: 1,192	Question about DVRack gray card use Can someone explain how to use these properly and what the levels should be in DVRack/OnLocation? There is no black, just gray tones so I'm not sure what I should be trying for to achieve proper exposure. Thanks __________________ Paul Cascio www.pictureframingschool.com

February 21st, 2008, 04:07 PM	#2
Marc Colemont Major Player Join Date: Nov 2005 Location: Belgium Posts: 695	The goal is to have the black chip of the card as low as possible on the waveform, and the white chip near 100%. That way you are exposing the maximum latitude on the camera. It should show a so called 'Stair case' on the waveform monitor. One must say that DSCcharts are much better then the carton printed stair case which is provided with DV rack. But it does it's job too. Make sure to aviod reflexions on the card when you are shooting it. __________________ Marc Colemont - Belgium - http://www.mc-productions.be JVC GY-HM850's, HM890, HM600