ISO rating at DVinfo.net

Christopher Glaeser · November 6th, 2006, 02:59 PM

Has Canon published or has someone measured and posted the ISO sensitivity of the XL-H1 sensor at each gain setting?

Best,
Christopher

Barry Green · November 6th, 2006, 09:35 PM

I don't know if Canon has published their figures, but when we tested it we found the base sensitivity is 200.

Each 6dB of gain = a doubling of perceived sensitivity, so at 6dB = 400, 12dB = 800, etc.

Jonas Nystrom · November 7th, 2006, 01:06 AM

Hmmm... according to another forum it is 320.

John Richard · November 7th, 2006, 09:54 AM

We were having trouble determining which was the exact ISO for using an incident light meter. We were trying to keep our key/fill ratios on the actor's faces consistant.

It would be nice to know the correct ISO correlation for light meter use.

November 6th, 2006, 02:59 PM	#1
Christopher Glaeser Major Player Join Date: Sep 2005 Location: Pleasanton, CA Posts: 258	ISO rating Has Canon published or has someone measured and posted the ISO sensitivity of the XL-H1 sensor at each gain setting? Best, Christopher

November 7th, 2006, 01:06 AM	#3
Jonas Nystrom Major Player Join Date: Jan 2006 Location: Göteborg, Sweden Posts: 306	Hmmm... according to another forum it is 320. __________________ Jonas Nyström, DoP :: HOT SHOT® SWEDEN :: www.hotshot.nu :: RED #1567, RED 18-50mm T3 :: XL A1, Letus Extreme :: XL H1, 20X & 6X lens (for sale) :: www.vimeo.com/nystrom

November 6th, 2006, 09:35 PM	#2
Barry Green Barry Wan Kenobi Join Date: Jul 2003 Location: North Carolina Posts: 3,863	I don't know if Canon has published their figures, but when we tested it we found the base sensitivity is 200. Each 6dB of gain = a doubling of perceived sensitivity, so at 6dB = 400, 12dB = 800, etc.

November 7th, 2006, 09:54 AM	#4
John Richard Major Player Join Date: May 2006 Location: Incline Village, Nevada Posts: 604	We were having trouble determining which was the exact ISO for using an incident light meter. We were trying to keep our key/fill ratios on the actor's faces consistant. It would be nice to know the correct ISO correlation for light meter use.