Quote Originally Posted by CPorter View Post
......and the posts that are knocking the OPs efforts are helping him how? It bothers me not on negative opinions of finding the effective film speed, but diverting the thread away from OPs request for assistance annoys the piss out of me. Start another thread ......there's sure to be plenty of participants.
The most significant learning experiences I've had in photography and life have come where my basic assumptions for something were challenged. It has been rare in my life that these challenges come in a linear manner in the context of my choice. The world seems to throw them at me in a very random manner and they barge in where they please.

You, the OP, and any other reader are welcome to use or disregard anyone else's input to any thread as you please, beyond that this is essentially a public space.

That three of us "saw" the same concern is telling. Maybe there is something to learn there.