二手 Sigma AF 17-50mm F2.8 EX DC OS 鏡頭 - Canon 接環

Picked this up used and the autofocus is snappy even on my older Rebel body — the OS really helps keep handheld shots sharp down to 1/15th of a second.

Even in low light, that constant f/2.8 aperture is a game changer—I was able to shoot a dimly lit indoor event without a flash for the first time. The autofocus feels snappy on my Canon body, and despite being used, the glass is crystal clear with no issues.

The constant f/2.8 aperture is a lifesaver for indoor family shots—I didn't need the flash at all during a dimly lit birthday party. Focus was snappy on my Canon, and the used condition had no scratches on the glass. Exactly the low-light workhorse I was hoping for.