Archived posting to the Leica Users Group, 1998/06/05

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Subject: Re: [Leica] Leica Nomenclature
From: Eric Welch <>
Date: Fri, 05 Jun 1998 23:51:33 -0500

At 07:00 PM 6/5/98 -0400, you wrote:
>At 03:46 PM 05-06-98 -0800, Charlie wrote:
>>>and what does "APO" mean ?
>>APO is short for apochromatic which should mean that a point of white light
>>entering the lens is focussed on the film as a point of white light and not
>>a point of white light with colored edges where the light has been bent
>>differently according to its frequency.
>Ah, but it doesn't actually answer the question, "what does APO mean?"  I
>would like to know this as well.

That IS what APO means, that all three colors focus on the same plane (i.e.
- --

Eric Welch
St. Joseph, MO

You know how to make God laugh? Make a plan. - Anonymous