[verysoftmen]

邊間好D?
質量, r&d... etc....

[wlachan]

They all have a bunch of low quality lenses with a selected few high quality ones.

[tam_dominic]

Sigma 100-300mm F4 EX is a good lens
Wish there will be a lighter one for APS sensor with the same quality.

[poodlebb]

除?canon外我就用sigma，真係乜quality都有:

1. 18-125mm: 唔多得，用?一年瓜?，focus好慢，好noisy。
2. 70-300mm: 好少用，但用?影過macro，影過賽車都ok。
3. 30mm: 好好用，依家愛上佢成日用

[Bravey]

I use Sigma 18-50 F2.8 and feel ok for normal use la.....