Thanks useful information: 
oops! my bad there I have to admit.Originally Posted by arthurking83
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Using the same camera settings and capturing the same DOF in the scene, the images of each respective emulsion will look the same when viewed in the same manner
......
I started to write that sentence in one way and altered it mid way and forgot to change the entire sentence to make more sense.
(I have to admit to an inability to multitask when frustration of PC hardware gets the better of me .. was trying to fix a constantly locking up friends PC at the same time).
I have to bow out of this thread myself too.
It's obvious that the OP is trying to explain something which is I suppose hard for me to understand.
That there is some myth being bandied about that two things that are the same .. are the same!
(if this myth needed debunking, I think you're probably the person to do it).
And you're probably right .. in that I have very little understanding of basic exposure.
My apologies for taking the discussion off your preferred course.
