[kenkenkt]

想比較下呢兩支鏡:
Canon---EF 75-300mm f/4.0-5.6 III USM
Sigma---APO 70-300mm F4-5.6 DG Macro

本人想知兩支鏡分別有多大。我用400d的。 thx~

[老叟]

不如諗龍仔A17啦,千零文乍

[Dericxhk]

用長鏡, 我一定會揀有鏡身馬達既
因為用得長鏡, 好多時會係打雀, 偷拍snapshot, 影小朋友咁
如果對焦慢, 又嘈, 要影既野都走左啦, 幾sharp都冇用

看來canon既usm會係合乎呢個原則,
有講錯請插><!!

[bb1032003]

If use for Canon even Sigma will have motor built in the len for the AF but the motor is not HSM (Sigma's USM) for this len which will be slower compare with Canon 75-300 4-5.6 USM.

[yung2]

買Tamron或Sigma。。。