Pentax originally designed this lens with an aspheric element. But it was too hard and expensive to make so they switched the design to a purely spherical one. Apparently quite a few of the Taks (900) were made aspherically, and a few of the K (100) were that way. Then the formula switched and every lens after that, including all A type lenses, were spherical.

What is incredible, is the bidding war that ensued over this particular specimen. Either they figured out through strategic questions that this was indeed an AL lens, or they just plain lost their minds, since the A type lens is still being made today and it goes for not much more new than what it went for in the auction.

rg


Shel Belinkoff wrote:
AL version?  What's that?  I didn't think the K15/3.5 was all that rare to
warrant so high a price as this one sold for.  Is this a reasonable price
for a K15/3.5?  Wasn't there a SMC Tak 15/3.5 as well?  I'd like to learn
more about the various iterations of this lens.  Anybody an expert on these
puppies?

Shel



[Original Message]
From: Gonz <[EMAIL PROTECTED]>
Dunno, but I wonder who got this one:

http://tinyurl.com/547s5

I wonder if someone determined this was the AL version? According to Boz/Dario, only 100 were made.






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