Now this I'd like to hear more about.  Can you elaborate on this point,
specifically, how do manufacturers get away with labeling a lens as
Apochromatic when it isn't?  Is the term "APO" used to imply that a lens
is apochromatic, when, in fact, it's just a model name given to the
lens?  Which lenses that are designated as "APO" lenses are not, in
fact, apochromatic?  Which are?  Just a few examples would be
appreciated.

Would a lens have to be designated as "apochromatic" to be apochromatic,
as opposed to being labeled as "APO", which may not be apochromatic?

Mike Johnston wrote:

> and virtually all camera lenses labeled as "Apo," aren't.

-- 
Shel Belinkoff
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http://home.earthlink.net/~belinkoff/pow/enter.html
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