Re: 100/4 Macro?

[graywolf]

That is like saying a 1950 Fiat 500, 1957 Ferrari Tessa Rosa, a 1970 Ford Pinto 
all have a inline 4 cylinder engine. There is a lot of room for variation in 
performance there, and it does not mean they are exactly the same. A 5 element 3 
group lens can very a lot in glass, curves, and spacing. On the other hand they 
could all be exactly alike. You could not tell from just looking at the generic 
layout drawings. You would have to have the exact optical specifications, and 
they are not going to publish those.

--
Michel Carr�re-G�e wrote:
I believe that since 1964, with the 4/100mm Bellows Takumar (not SMC), 
until 1989 with SMC A 4/100mm, all lenses use the same optical formula: 
5 lenses in 3 groups.

--
graywolf
http://graywolfphoto.com/graywolf.html