Archived posting to the Leica Users Group, 2003/04/13

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Subject: RE: [Leica] OT: KL vs PKL
From: Henning Wulff <henningw@archiphoto.com>
Date: Sun, 13 Apr 2003 21:51:13 -0700
References: <064201c30233$d0ca6aa0$056fa8c0@MillStone>

At 11:13 PM -0400 4/13/03, Lew Schwartz wrote:
>So what's the difference between Kodachrome and Pro-Kodachrome 200?
>
>-Lew

Age. The emulsions are exactly the same.

Pro Kodachrome is released when it has aged to the design point re: 
colour response, whereas as amateur Kodachrome is released 'green' 
and intended to sit on room-temperature shelves for a couple of 
months until it reaches the same point.

If you buy 'fresh' amateur Kodachrome, you should let it sit for 
about 6 months at room temperature, test it to determine that it's 
what you want _now_ and freeze the rest, thawing it as you need it. 
That way you'll get the best of both worlds; cheaper Kodachrome, 
tested and tried and consistent.

Even if you get a couple of bricks of pro Kodachrome, you should test 
a roll to see if the colour response suits you needs, or what 
filtration may be needed.

Speed variations will also be noticed, as film is generally released 
with a +/- 1/3 stop variation (but is usually better than that now).

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    *            Henning J. Wulff
   /|\      Wulff Photography & Design
  /###\   mailto:henningw@archiphoto.com
  |[ ]|     http://www.archiphoto.com
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In reply to: Message from "Lew Schwartz" <lew@clsystems.com> (RE: [Leica] OT: KL vs PKL)