Thanks Alin,
That's interesting, just been playing with the Ricoh KR-10 I received the
other day (Thank you again Mark), and noticed there is an adjustment for asa
settings of +/- 2.
Given a 3200 ASA film, I was told use it at 800 ASA. Am I right to assume
this is equivalent to 2 stops?
James
----- Original Message -----
From: "Alin Flaider" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, April 10, 2001 3:57 AM
Subject: Re: SPF/SP and using date expired B&W and Colour films.
>
> James,
> All colour emulsions lose sensitivity due to natural radioactivity
> and internal diffusion between layers. I hear the rate is somewhere
> around half of stop each year, maybe more for faster films. It also
> depends largely on the film.
>
> Servus, Alin
>
> James wrote:
>
> JA> A professional photographer friend of mine, recently gave me some
surplus
> JA> date expired B&W and Colour films he had stored in his freezer. As he
is
> JA> away at Whisler as a ski instructor most of the ski season, he would
not be
> JA> able to use the film. He also said, I may need to adjust film speed
down
> JA> [e.g. 3200asa to 800asa]. Can anyone explain why (can't get hold of
him to
> JA> ask more)?
>
> JA> The film types are:
> JA> 1. Tmax TMZ 135 p3200
> JA> 2. Kodak Pro1000 PMZ-36 (C-41)
> JA> 3. Kodak Tmax-400 TMY-36
> JA> 4. Kodak Pro Supra 400
>
>
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>
>
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