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Re: [OM] origin of film speed values [was: Sunny 16?]

Subject: Re: [OM] origin of film speed values [was: Sunny 16?]
From: Jay Maynard <jmaynard@xxxxxxxxx>
Date: Wed, 23 Jun 1999 09:29:17 -0500
On Wed, Jun 23, 1999 at 09:23:28PM +1000, Wiese wrote:
> so the relationships look skewed with ASA values, unless you think in
> multiplications :-)

For me, this is precisely the attraction of the ASA scale: the other
parameters we regularly control, shutter speed and aperture, are
multiplicative, so having the film speed act the same way means you don't
have to recalibrate your thinking.

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