[jsklee]

Recently there is a lens comparison done in this website:

http://www.dcfever.com/news/readnews.php?id=2861

It mentions the following:
(1) Sigma 於色散的控制亦要較其餘兩支要出色 and
(2) Sigma 50mm F1.4 EX DG HSM 的確是近年 Sigma 的代表作，各方面都有上佳表現

When you see the following website, you will see a different conclusion.

http://www.dpreview.com/lensreviews/widget/Fullscreen.ashx?reviews=25,23&fullscreen=true&av=1,1&fl=50,50&vis=VisualiserSharpnessMTF,VisualiserSharpnessMTF&stack=horizontal&lock=&config=/lensreviews/widget/LensReviewConfiguration.xml%3F3

(1) For CA: Sigma only wins Canon at f/1.4. From f/2.2 onwards, Canon is the absolute winner.

(2) For resolution: Sigma wins Canon when aperture is larger than f/3.5. From f/3.5 onwards, Canon wins.

Which website do you believe?