What would the ASA be? at DVinfo.net

Steven D. Martin · February 7th, 2006, 06:41 PM

Hello all:

If I were shooting 24p with the gain at 0 and no ND filter, what's the light sensitivity of the CCDs, and how would the camera compare to film? What film speed would be shot to get similar settings (shutter & aperture) on the HD100?

I have a really nice cine light meter that would be good to use from time to time. Many thanks-

+Steve

Nate Weaver · February 7th, 2006, 06:48 PM

If you're using Standard gamma, it's a little less sensitive than 320...maybe a 1/4 stop. 300ish?

If you're using Cinegamma, then the same number minus a stop. So 160 - 1/4 stop = 120?

Tim Dashwood · February 7th, 2006, 06:50 PM

And if you increase the gamma it can go as high as 600ASA(on 0 dB)

Steven D. Martin · February 8th, 2006, 05:31 AM

Sounds like I need to set the camera up and do my own tests. I'm an old Zone System photographer, so reading a spot meter feels pretty comfortable. It would be nice to put my Sekonic L-508 to good use.

Jon Glen · February 14th, 2006, 10:44 AM

Nate or Tim is it common for you guys or "shooters" in general to use a light meter for DV/HDV?

Jiri Bakala · February 14th, 2006, 11:07 AM

The "zebra" pattern is your built-in light meter. As a friend of mine used to say in the mid-nineties: "My betacam is a $50,000 light meter." Unless you can be 100% certain on the ASA rating of the camera (and apparently we can't since it fluctuates so much based on various settings), the use of a light meter is actually less precise.

Tim Dashwood · February 14th, 2006, 04:39 PM

Quote:

Originally Posted by Jon Glen

Nate or Tim is it common for you guys or "shooters" in general to use a light meter for DV/HDV?

I use an incident light meter all the time whether it is video or film. However, when shooting video, I usually only use the light meter to set light ratios and keep track of how many stops over and under I go into the shadows/highlights, and then set the final exposure with the zebras.

February 7th, 2006, 06:41 PM	#1
Steven D. Martin Regular Crew Join Date: Nov 2005 Location: Oak Ridge, TN Posts: 72	What would the ASA be? Hello all: If I were shooting 24p with the gain at 0 and no ND filter, what's the light sensitivity of the CCDs, and how would the camera compare to film? What film speed would be shot to get similar settings (shutter & aperture) on the HD100? I have a really nice cine light meter that would be good to use from time to time. Many thanks- +Steve

February 7th, 2006, 06:48 PM	#2
Nate Weaver Wrangler Join Date: Oct 2002 Location: Los Angeles, CA Posts: 2,100	If you're using Standard gamma, it's a little less sensitive than 320...maybe a 1/4 stop. 300ish? If you're using Cinegamma, then the same number minus a stop. So 160 - 1/4 stop = 120? __________________ My Work: nateweaver.net

February 7th, 2006, 06:50 PM	#3
Tim Dashwood Wrangler Join Date: Aug 2005 Location: Toronto, ON, Canada Posts: 3,637	And if you increase the gamma it can go as high as 600ASA(on 0 dB) __________________ Tim Dashwood

February 14th, 2006, 11:07 AM	#6
Jiri Bakala Major Player Join Date: Apr 2004 Location: Kelowna BC Canada Posts: 706	The "zebra" pattern is your built-in light meter. As a friend of mine used to say in the mid-nineties: "My betacam is a $50,000 light meter." Unless you can be 100% certain on the ASA rating of the camera (and apparently we can't since it fluctuates so much based on various settings), the use of a light meter is actually less precise. __________________ www.ascentfilms.com

February 8th, 2006, 05:31 AM	#4
Steven D. Martin Regular Crew Join Date: Nov 2005 Location: Oak Ridge, TN Posts: 72	Sounds like I need to set the camera up and do my own tests. I'm an old Zone System photographer, so reading a spot meter feels pretty comfortable. It would be nice to put my Sekonic L-508 to good use.

February 14th, 2006, 10:44 AM	#5
Jon Glen Regular Crew Join Date: Jul 2005 Location: Vancouver Posts: 40	Nate or Tim is it common for you guys or "shooters" in general to use a light meter for DV/HDV?