日本SIGMA 發表原定2009年1月25日(星期日)在日本地區上市的
4/3用 50mm F1.4 EX DG HSM

延期至2009年2月11日上市
http://www.sigma-photo.co.jp/news/50_14_ex_dg_ft.htm

參考
SIGMA 50mm F1.4 EX DG HSM
http://photofan.jp/camera/html/modules/newbb/viewtopic.php?viewmode=flat&topic_id=4751&forum=3

目前台灣已經買得到了，某知名水貨商的報價是一萬六千八百。

和50F2的公司貨是一萬九比起來是便宜了一些。

差個兩千多元
雖然光圈大了一格

但是少了微拒和防水防塵的功能
似乎不是很吸引人

對於人像攝影者，我想這隻死馬的五十還是滿有吸引力的。

ZD 50mm F2.0對焦比較慢，再者，較無法做出全身淺景深的效果。

Simga 50 F1.4對焦較快，大一級的光圈較易做出全身淺景深。

http://www.dpreview.com/lensreviews/olympus_50_2_o20/page4.asp

dpreview在評測ZD 50mm F2.0時有對Sigma 50mm F1.4做出一些比較

We expect many potential buyers will be interested in comparing the 50mm F2 Macro to the Sigma 50mm F1.4 EX DG HSM, which has been recently announced in Four Thirds mount. Our recent review of this lens (albeit in Canon EF mount) should give a good idea of what to expect; the Sigma is likely to be no slouch on Four Thirds, but unsurprisingly for a lens designed for a format with four times the area, won't quite achieve the same stellar levels of sharpness we see from the Olympus macro. The faster maximum aperture and more refined ring-type USM focusing will surely make the Sigma a compelling option for portrait shooters, but in all other regards the Zuiko is likely to be the better all-round option.