Originally Posted by
Oren Grad
Larry, the error was mine, not yours. I've reset the thread title accordingly, and I apologize for the grief it caused you.
FWIW, I can't recall reading about any still photographer using a sensitometer to expose film for these tests - it's always been a step tablet and/or carefully timed direct exposures to light. The methods Phil Davis describes in the various editions of "Beyond the Zone System" are par for the course. The only references I can find to sensitometers relate to use for X-ray and cine film process control in a commercial setting. I'm happy to be corrected if someone can point to documentation. But if you can lay your hands on one inexpensively enough, and can figure out how to check its calibration...
Bookmarks