Sigma 50mm f/1.4
|Focusing distance:||45cm / 17.7in|
|Lens size:||ø84.5mm x 73.7mm / ø33.3in x 29in|
|Weight:||530g / 18.7oz|
|Construction:||8 elements 6 groups|
A full frame normal lens adapted to Four Thirds.
Eddie's take on it
Since this lens came out pretty late (2009), there is very little info online about using it on Four Thirds. In 2009, Micro Four Thirds had already come out and interest had already shifted. On Full Frame and APS-C it shows vignetting and bad sharpness in corners, but since Four Thirds is 2x crop, these would theoretically be cropped out.
In FF and APS-C reviews, it has the usual problems associated with fast aperture Sigma primes of the era - sub par image quality wide open (especially outside center), frequent back/front focusing problems, general sample variation, hunting autofocus.
Given that the Olympus 50mm f/2 macro is one of the most highly acclaimed Four Thirds lenses, its easy to see why few bought this. Finding it on ebay appears to be mission impossible.