Archived posting to the Leica Users Group, 1999/01/14

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Subject: [Leica] Re: Weston Master V - Zone VI Spot meter
From: Jim Brick <>
Date: Thu, 14 Jan 1999 17:34:20 -0800

" Zone VI Modified Pentax Digital Spot Light Meter 

The industry standard. These modified Pentax Spot meters provide extremely
accurate and critically selective exposure readings, plus greater
consistency. Ideal for Zone System applications. Modifications include: a
series of step-down baffles installed to eliminate flare, infra-red
absorbent coating to eliminate reflections, four corrective filters to
match meter's spectral response to that of the film, superior photo
electric cell and calibration of meter to within 1/6 stop of linearity over
their range. "

Above is the quote from Zone VI,


At 07:35 PM 1/14/99 -0500, you wrote:
>At 03:21 PM 1999-01-14 -0800, Jim Brick wrote:
>>I had my Pentax Spot Meter updated and calibrated by (then) Zone VI so that
>>it would match the response pattern of photographic emulsions.
>This is simply impossible, despite what (then) Zone VI might have assured
>you.  Selenium matches the response pattern of photographic emulsions more
>closely than does CdS or SPD or Gallium Arsenide.  The laws of chemistry, I
>suspect, are as immutable on this as the laws of economics which dictate
>that we all devote the equivalent of the GNP's of Third-World Countries in
>order to purchase Leicas.
>Check it out.
>  FAX:  +540/343-7315
>Cha robh bas fir gun ghras fir!