[火Ken]

不計算價$$ 前者 Canon EF-S 17-55mm f2.8 IS USM 有無ching用過？A16比下去又怎樣？？

[slee_rx]

try here you will know

http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?FLI=0&API=0&Sample=0&FLIComp=0&APIComp=0&LensComp=400&CameraComp=396&SampleComp=0&Lens=398

[火Ken]

其實我不太完全明，但比較下.....好似A16價錢同質素好d，我有睇錯嗎ching？

[tcfreeman]

is & usm, glasses quality so close