Conclusion: But it's a little expensive when its failings are considered. Considering the performance of the much cheaper and Alpha-compatible Tamron SP AF 90mm F/2.8 Di optic, it's hard to see how the Sony justifies this lens' price.
Excerpt: Based on the previous Minolta 100mm macro lens, the Sony 100mm f/2.8 Macro is one of two current Sony macro options, the other being the shorter 50mm f/2.8 lens. It's compatible with both full-frame DSLRs and Sony's extensive range of APS-C Alpha models, on the latter giving an effective focal length closer to around 150mm.
Excerpt: Designed for use with Sony full-frame models as well as APS-C D-SLRs and D-SLTs, when used with the latter types it transforms into a 150mm f/2.8 in conventional film terms and features a minimum focusing distance of 35cm. There's no MF/AF switch on the lens barrel as this is controlled from the body on Sony D-SLRs, but there is a focus range limiter switch to restrict focusing between infinity and 60cm (equivalent to a 1:4 reproduction ratio).
Sony 100mm f/2.8 macro (SAL-100M28) - Review / Lab Test Report
31 October 2008
Conclusion: The Sony 100mm f/2.8 macro is able to produce very sharp results combined with a negligible amount of distortions, vignetting and lateral CAs. However, longitudinal (axial) chromatic aberrations can be quite a problem in out-focus areas (f/2.8-f/5.6) resulting in a magenta to greenish tint in some situations - this is not unusual but unfortunate nonetheless.
Summary: A makrózás örök sláger már a kezdő fotósok között is. Az első DSLR mellett pedig nagyon jó szolgálatot tehet egy igazi, 1:1-es leképezésű makró objektív, lehetőleg 100mm-es gyújtótávolsággal. Most a Sony paletta fenti kívánalmaknak megfelelő optikáját mutatjuk be.