Capocheny
2-Sep-2006, 22:35
Quick question as a follow up to Jimbobuck's thread, "Zone System... relevance when scanning negs digitally."
How many of you Zone System/BTZS users here test and determine the true ISO for each of your films?
For example, if you buy 2 boxes of FP4+ and they each come from a different batch, do you do individual tests on each box? Or, do you assume that the true ISO will be minimally different and, therefore, you use the same film speed for both boxes?
Now, let's assume that your gear (i.e., shutter speeds) is consistent and you don't process your own film (but, you take it to a Pro Lab for processing)... you've done your true speed tests on one box of FP4+, will you do it for the next box of film you purchase? Or, is it okay to use the film speed you've determined to be true from the last set of tests?
Now, I DO understand that one does these tests to "calibrate" your shutter speed, aperture opening, meter, and processing technique. What do you do if you decide to use a different meter? Or, a different lens? Again, let's assume that your film goes to a Pro Lab for processing. Do you still use the same results from one set of tests?
I studied the Zone System back about 25 - 30 years ago and am now looking to get back into doing more of it. I'm just now in the process of reading The Negative again...
My purpose in posting this thread is to see what all of you folks do... :)
So, thank you for all of your comments in advance.
Cheers
How many of you Zone System/BTZS users here test and determine the true ISO for each of your films?
For example, if you buy 2 boxes of FP4+ and they each come from a different batch, do you do individual tests on each box? Or, do you assume that the true ISO will be minimally different and, therefore, you use the same film speed for both boxes?
Now, let's assume that your gear (i.e., shutter speeds) is consistent and you don't process your own film (but, you take it to a Pro Lab for processing)... you've done your true speed tests on one box of FP4+, will you do it for the next box of film you purchase? Or, is it okay to use the film speed you've determined to be true from the last set of tests?
Now, I DO understand that one does these tests to "calibrate" your shutter speed, aperture opening, meter, and processing technique. What do you do if you decide to use a different meter? Or, a different lens? Again, let's assume that your film goes to a Pro Lab for processing. Do you still use the same results from one set of tests?
I studied the Zone System back about 25 - 30 years ago and am now looking to get back into doing more of it. I'm just now in the process of reading The Negative again...
My purpose in posting this thread is to see what all of you folks do... :)
So, thank you for all of your comments in advance.
Cheers