Samyang 100 mm f/2.8 ED UMC MACRO
The offer of independent producers is hardly worse: there is the stabilized Tamron 2.8/90 VC and the Sigma 2.8/105 OS, along with the Tokina 2.8/100 without any stabilization. If you care more about a superior aperture fastness at the expense of the 1:1 scale you might pay closer attention to the...
sensational resolution in the frame centre; good image quality on the edge of the APS-C/DX; imperceptible longitudinal chromatic aberration; low lateral chromatic aberration; lack of spherical aberration problems; practically zero distortion; moderate coma; low astigmatism; nice appearance of blurry...
the frame edge near the maximum relative aperture is noticeably worse than in the case of direct rivals; too high vignetting on full frame; manual focus ring could have been better