| I used a Sigma 30 for over a year on my K100D, sold it before I got my K20, so it's a little hard to compare directly to lenses I use now, but it's a good lens. Big, felt solid to me, nice focusing ring, and showed hardly any signs of use when I sold it.
The edge sharpness problem is a little overblown, I think. It's not as sharp as the centre, no, but it's not what I would call blurry or anything. Seems to do better with the real world than the focus chart.
It does the job isolating subjects and the bokeh is very smooth. However, its out of focus areas definitely lack the character of the FA limiteds and the DA*55, so if you're expecting a shorter DA*55 you're going to be a little disappointed.
The FA 31 is a little tempermental, has a little trouble with high contrast situations (fringing, blooming), but is overall the better lens. |