Hi!
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)..
Unless I am mistaken, this adaptor was designed along with the lens. It
says somewhere that one can use this adaptor with other Tamron Adaptall
lenses, but it is still *matching* adaptor.
The macro focusing tele-converter that you have (I suspect it is
Vivitar) is general purpose optic.
I've done some photography (thank you Shel, no more violence from this
guy ;-) ) with 180/5 1:1. It is good enough for my purposes.
Naturally, if you can get a one-piece lens that will go 1:1 it is
preferable. I got my Tamron combo at very good price from fellow list
member... I am very happy about it.
And remember, on *istD you get extra x1.5 for free.
Boris
