Sigma 105mm f/2.8 EX macro

[Toralf Lund]

Yet another used lens I came across: Sigma 105mm f/2.8 EX macro (Pentax 
version, obviously.)
Anybody here using it? Is it any good? I'd use it mainly for macro work, 
probably - instead of a 50mm+macro teleconverter.

- Toralf