DVX100A ISO rating

[Ruel]

When doing location scouts I use a light meter set at 24FPS and ISO 400 to measure ambient sources.

Does anybody know what the ISO rating for the DVX is?

Also, how do you perform tests to determine ISO ratings of video cameras?

Thanks.

 

[MichaelP]

Re: DVX100A ISO rating

With 1/48th of a shutter, and everything at 0 settings, the camera is 320 ASA. Set up a gray card in a controlled flat lighting environment and measure with the auto expisure of the camera and with the light meter.

 

[Barry_Green]

Re: DVX100A ISO rating

Using that same setup, 1/48 of a second, progressive-scan, gray card and verified against a spot meter, I came up with a consistent 640 ASA. Filmmaker58 repeated the test using his own light meter, and also got 640 ASA. There's a long thread on here somewhere that discusses it...

 

[Guest]

Re: DVX100A ISO rating

Hey Barry-

with regard to ISO rating in general:
wondering why this is important to know.......unless of course there is a significant difference in capture rates of video stock from mftg to mftg.
what am i missing?

Thanks,
Brian

 

[Barry_Green]

Re: DVX100A ISO rating

If you're using a light meter to check the light in a scene, you'd need to know the ISO of the camera. While light meters aren't that important in video shoots, they can be handy when location scouting, or to set ratios by eye. Also, sensitivity dictates the amount and type of light you might be using for a shoot. But for the most part, for most video shooting, it's relatively academic.

 

[bedmurphy]

Re: DVX100A ISO rating

thanks Barry-

so i'm not going crazy after all.

Brian