Sigma 50MM F/2.8 EX DG Macro

Excellent sharpness at all but smallest apertures. Smooth, but underdamped manual focusing. AF limiter for full or macro range. Maximum magnification: 1:1.

Standout Spec: The least expensive lens here to offer life-size magnification.

Hands On: Zeiss ZF Macros for Nikon
Field Test: Canon MP-E 65mm f/2.8 1-5x Macro

Sigma 17–70mm f/2.8–4 DC OS Macro HSM
Tamron SP 60mm f/2 DI II Macro
Canon EF 50mm f/2.5 Macro
NIKON AF MICRO-NIKKOR 60MM F/2.8D

Canon EOS Rebel T2i
Nikon D3000
Pentax K-5
Sony Alpha 550