Quote Originally Posted by Alan Klein View Post
I have a densitometer tool on my Epson scanner program. What advantage would there be in using it and how would you do that?
I can't say with respect to your Epson scanner program.

I use a densitometer for black and white film tests. As part of my calibrations, I need to know my film curve for development times. So if not full sheets, I'm measuring about 10mm diameter film patches with a densitometer. Thereby, a 3mm aperture would work fine for my purposes.