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

[Toralf Lund]

Boris Liberman wrote:

Hi!
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?


It is 90/2.5 1:2 macro and with matching adaptor it is 180/5 1:1 
macro. The latter being even more useful because of greater working 
distance from the subject - less intrusive!

How well does the adaptor work? I mean, does it hurt the performance in 
any way? I guess I'm a bit sceptical to using an extender, based on the 
fact that the whole point would be to replace a 2X macro focusing 
teleconverter (which I've used mainly with 50mm lenses)..


Boris