Boris Liberman wrote:
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.
Is this a 1:2 macro?
Yes. You add the Tamron 1:1 tube to get to life size. You add it
"before" the Tamron K-mount. This Tamron k-mount goes to the tube.
You can also put the Tamron lens with its K mount over a combination
of tubes reaching 45mm to get to life size.
By the way, the 100mm f4 is excellent. With it, you need to add 50mm
of tube to get to 1:1, so either with the 50mm pentax tube or with a
combination of some of the tubes in the pentax set of three (or from
a set from another brand)
Andre
- Re: K/M/A f/4 100 mm macro vs FA-100 f/2.8 Andre Langevin
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