ISO rating for the canon XL1s at DVinfo.net

May 27th, 2002, 07:17 PM

I am interested to know if anyone has any information or has done any tests on an ISO rating for the XL1s I will be working on a project in which the grip and electric dept have no previous video experience and if I could give the Gaffer some reference I would be able to have them light sets ahead of time and not wait til the camera is set up and light to the monitor. if anyone can help please let me know Thank you in advance.

Chris Hurd · May 27th, 2002, 09:47 PM

There are two long, detailed articles on the XL1 Watchdog for ASA / exposure index ratings for the XL1, I suppose we need to update them for the XL1S, if anybody has any input on that, it would be most welcome.

Justin Chin · May 28th, 2002, 12:29 AM

So I've heard anything from 100 to 160asa.

I'm going to get a gray card tomorrow and see what I come up with.

John Klein · May 29th, 2002, 01:12 AM

I used to think about 160/200. Now that I'm bumping up my setup, it's gonna be even better!

Justin Chin · May 29th, 2002, 01:22 AM

JoPhoto:

I believe the XL1s is "faster". I don't really know why. Anyone else?

Chris Hurd · May 29th, 2002, 06:46 AM

Because of the cleaner CCD block? 4db improvement over the old, giving better low-light performance and therefore increased ASA?

Bill Ravens · May 29th, 2002, 07:03 AM

In tests I've run on my XL1s, the ASA rating is 160. Be aware that the photo-response of the CCD light meter is not truly linear, however. That is to say, it will vary from ASA160 during over/under exposure. So, you may not care, and, indeed it will not matter when using the on board light meter. Beware of relying on an external light meter for setup, however.

Chris Hurd · May 29th, 2002, 07:16 AM

Thanks Bill,

In the ASA rating articles on the Watchdog, Bill Farnsworth calls the video camera "the world's most expensive light meter" anyway. I tend to let the camera tell me what level of light it's reading, and try to adjust things so that I can get the iris to f/5.6 or f/4.8 or thereabouts.

May 27th, 2002, 07:17 PM	#1
rasmod71 Posts: n/a	ISO rating for the canon XL1s I am interested to know if anyone has any information or has done any tests on an ISO rating for the XL1s I will be working on a project in which the grip and electric dept have no previous video experience and if I could give the Gaffer some reference I would be able to have them light sets ahead of time and not wait til the camera is set up and light to the monitor. if anyone can help please let me know Thank you in advance.

May 27th, 2002, 09:47 PM	#2
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,366 Images: 513	There are two long, detailed articles on the XL1 Watchdog for ASA / exposure index ratings for the XL1, I suppose we need to update them for the XL1S, if anybody has any input on that, it would be most welcome. __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

May 28th, 2002, 12:29 AM	#3
Justin Chin Major Player Join Date: Feb 2002 Location: Oakland, CA Posts: 227	So I've heard anything from 100 to 160asa. I'm going to get a gray card tomorrow and see what I come up with. __________________ justin www.monsterrocket.com Filmmaker \| Cinematographer

May 29th, 2002, 01:12 AM	#4
John Klein Regular Crew Join Date: Dec 2001 Location: Wisconsin, USA Posts: 182	I used to think about 160/200. Now that I'm bumping up my setup, it's gonna be even better! __________________ < >< . . . . . < >< . . . . . < ><

May 29th, 2002, 01:22 AM	#5
Justin Chin Major Player Join Date: Feb 2002 Location: Oakland, CA Posts: 227	JoPhoto: I believe the XL1s is "faster". I don't really know why. Anyone else? __________________ justin www.monsterrocket.com Filmmaker \| Cinematographer

May 29th, 2002, 06:46 AM	#6
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,366 Images: 513	Because of the cleaner CCD block? 4db improvement over the old, giving better low-light performance and therefore increased ASA? __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

May 29th, 2002, 07:03 AM	#7
Bill Ravens Join Date: Nov 2001 Location: santa fe, nm Posts: 3,264 Images: 10	In tests I've run on my XL1s, the ASA rating is 160. Be aware that the photo-response of the CCD light meter is not truly linear, however. That is to say, it will vary from ASA160 during over/under exposure. So, you may not care, and, indeed it will not matter when using the on board light meter. Beware of relying on an external light meter for setup, however.

May 29th, 2002, 07:16 AM	#8
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,366 Images: 513	Thanks Bill, In the ASA rating articles on the Watchdog, Bill Farnsworth calls the video camera "the world's most expensive light meter" anyway. I tend to let the camera tell me what level of light it's reading, and try to adjust things so that I can get the iris to f/5.6 or f/4.8 or thereabouts. __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

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