Archived posting to the Leica Users Group, 2000/02/29

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Subject: [Leica] apo defined?
From: Erwin Puts <imxputs@knoware.nl>
Date: Tue, 29 Feb 2000 10:31:23 +0100
 
Mike wrote in part:
"However, since no current "apo" enlarging lenses are truly apochromatic,"

Please explain to me what "truly apochromatic" is in relation to an 
enlarging lens. Do you imply that   the apochromatic correction 
should be different in enlarging lenses and taking lenses? And what 
is your definition of "apochromatic".
I am currently doing an extensive study about optical corrections and 
your ideas are mostw elcome.


Erwin