中古 Sigma 24-70mm f/2.8 DG OS HSM Art レンズ（Nikon用）

Picked this up used and was honestly surprised the glass is spotless—no scratches or haze, focuses fast for a third-party lens. The f/2.8 aperture handles low light better than my kit lens ever did.

Optical stabilization is a lifesaver for handheld evening shots—I’m getting tack-sharp images at 1/30th. The zoom ring is smooth and damped just right, and for a used lens in Good+ condition the glass is impressively clean.

The AF on this used copy locks on just as fast as my friend’s new version. I’ve tested it in low light and the OS really helps keep shots sharp at 1/40th. For $400 less than new, the glass is pristine and the 100-day warranty gives peace of mind.