OK - I know this has probably been done to death, but scattered across several threads, so I wondered if we could condense the accumulated wisdom of the PentaxForumites into one thread?
To start the ball rolling, I am very interested in a comparison between three macro lenses:
- Tamron SP AF 90mm F/2.8 Di Macro
- Sigma APO 180mm F3.5 EX DG HSM MAC (also the 105 and 150mm versions)
- Vivitar series 1 105mm
The particular aspects I'm looking for are the sharpness and IQ, the focusing using AF on a K10 or K20 body, the bokeh, and any PF or CA problems. I live in Queensland, Australia, where very bright sunlit days are commonplace, and CA/PF problems would be perhaps more obvious.
I should point out that I already own the Tamron SP90, and am considering a longer focal length macro such as the Sigma 180 for bugs and water insects.
I did read with great interest the thread by Jay Sherman re the Tamron 70-300 used as a macro - but how would this compare to say the Sigma 180 macro prime, for example?
One last point - any information re availability of the Vivitar lenses (none available here in Australia as far as I can find out), just in case my LBA takes me in that direction....
OK - over to you macro experts for comments