Trick for exposure when using ND's and light meter.

[Tim Joy]

Say I'm using my light meter to measure exposure and I have ND's on the camera. I want it to read what the camera is seeing. Is there a standard trick to set the light meter to compensate for the ND? Decrease the ISO? Increase shutter speed? If so, how much?

What do most dp's do for this? Thanks.

 

[Barry_Green]

Decrease the ISO based on the strength of the ND filters. Every .1 = 1/3 of a stop, so an ND .3 = 1 stop sensitivity reduction.

 

[emretufekci]

What model do you have? With the sekonic 768 cine models you can dial in adjustments. That way your ISO stays the same.

http://www.sekonic.com/products/Sekonic%20L-758Cine%20DIGITALMASTER.asp

 

[Tim Joy]

I have a sekonic zoom master. Don't remember the model, but it's not the cine version.

Barry, so if I'm at ISO 200 with an ND .3, I go to ISO 100? In other words, a doubling (or half) the ISO is 1 stop?

 

[Barry_Green]

Correct.