(Phil Lamerton) wrote in message . com...
I'd like to photograph a gray card outside on an overcast day, in
order to do some zone system testing with my new camera and lenses.

Since I will eventually be using the camera in the portrait studio
with a yellow/green filter, would it be wrong to do the testing with
the filter over the lens?

Thanks in advance for your advice on this.

phil lamerton

What 'camera and lenses'?