Re: K/M/A f/4 100 mm macro vs FA-100 f/2.8

[Boris Liberman]

Hi!

I'm still sort of casually looking for a real macro lens... Just 
wondering, how do you people reckon the old f/4 Pentax macros compare to 
the newer FA-100 f/2.8? (Just came across one of the former class for 
sale; not sure if it is the F, A or original K variant - I'm assuming 
these are all based on the same optical formula.) Also, how much of a 
point is AF for macro work? I mean, does the autofocus work very well on 
macro range?

My answer to similar question was to buy Tamron 90/2.5 SP lens in 
Adaptall 2 mount. It is fast and quite excellent optically. It is manual 
focus, but I don't find it an obstacle. Actually for macro work manual 
focus lenses are probably better because of the better damping of there 
focus rings - hence better focus precision.

Boris