[simonleung]

各位，小弟想問Sigma 80-400mm Ex 同Canon 100-400mm L 質數分別如何? Thanks!

[intellirei]

I have Sigma 80-400mm. Image quality is good and very sharp even at 400mm but it is heavy. better use a tripod or monopod when you shoot.

It is around 0.85 lbs heavier than Canon's counterpart (weighted 3lbs) but I think it is actually not much.

A bit slow in focusing but not terribly slow. It is a bit slower than Canon.

I choosethis lens because it offers a big bargain!