[88so88]

Which one is better
Sigma 10-20,Tamron 11-18, Tokina 12-24 or Canon 10-20

[variosonnar]

Canon EF-S 10-22 is the best in terms of image quality but also the most expensive.

[Cosplay]

Canon EF-S 10-22mm f/3.5-4.5 USM 街價 $5,000
Sigma AF 10-20mm f/4-5.6 EX DC HSM 街價 $3,500
Tokina AT-X 12-24mm f/4.0 124 Pro DX 街價 $3,700
＊大約價格

Canon會係最正，不過比較貴。
最平會係Sigma，成像唔會差。光圈只係細半級左右。
比我撰擇，我會偏向Sigma。

[variosonnar]

take a look at http://www.dchome.net/viewthread.php?tid=199223&extra=page%3D1

quite useful advice,