Thank you
I have look at the disk look good too.

Dave


Quote Originally Posted by RalphLambrecht View Post
Well done, but Iprefer the method where a target disk is placed into the scene and it's size is measured on the ground glass .a ruler measures the disk diameter, which has a direct link to the exposure compensation required.
good luck. ask for a free pdf of this method by sending a request to rlambrec@ymail.com