I suspect that they only approach perfection, as a goal, but never actually achieve it. The real world does have to be considered, ya know what I mean? In other words, when you get close enough, you can claim victory. To hold them to having to be perfect because they use the term APO is not realistic.
The lens manufacturers are just as critical of each others claims as we are. It may have an affect on our results but it also has an affect on their market share for their lenses. Some lens makers hold to the highest standards, and you pay a premium for their lenses. Some hold to just above the threshhold that allows them to call a lens an APO, so they can make their lenses more affordable to sell more. It's not really a matter of getting away with anything. Len --- -----Original Message----- From: Shel Belinkoff [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 21, 2001 11:57 AM To: [EMAIL PROTECTED] Subject: APO Lenses (was Re: Layers, Sharp Focus, and New-Fangled Color Film) 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 mailto:[EMAIL PROTECTED] http://home.earthlink.net/~belinkoff/pow/enter.html http://home.earthlink.net/~belinkoff/cameras/pentax_repair_shops.html - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
