Alexandru-Cristian Sarbu wrote:
> Well... rating an ISO 100 film at ISO 80 doesn't means 'overexposing by 1/5
> stop', but by 0.4.
> ISO 50 is 1 stop, and ISO 75 half stop lower than ISO100.
... just to clear this up early on
80asa is 1/3rd stop over for a 100asa film
the numbers (in thirds) go :
25 32 40 50 64 80 100 125 160 200 250 320 400 500 640 800
Bill
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Bill D. Casselberry ; Photography on the Oregon Coast
http://www.orednet.org/~bcasselb
[EMAIL PROTECTED]
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