User Tools

Site Tools


photo:sigma150mmf2.8macro

Table of Contents

Sigma 150mm f/2.8 EX DG HSM APO macro lens

introduction

  • a 1:1 macro lens designed for full frame sensors but available in a number of mounts including Olympus Four Thirds dSLR system
    • the Four Thirds version has been discontinued
    • the Four Thirds version can be used on Micro Four Thirds system but the AF will be very slow as it is not CDAF optimised and phase AF is slow - you probably should regard it more like a manual focus lens
  • beautiful optics - sharp wide open, low distortion, nice bokeh but slow AF - slower than the Olympus ZD 50mm f/2.0 macro lens
  • on many cameras, many models appear to have front-focus AF error issues requiring microadjustment to give sharp AF images.

specs

  • 150mm f/2.8
  • as with most macro lenses with internal focusing (IF), the lens looses between 1.5 to 2 f-stops in speed and the focal length reduces when set to the min. focus distance!
  • closest focus 38cm giving 1:1 macro and 7.6“ working distance
  • detachable tripod collar
  • barrel-type lens hood
  • 72mm filter
  • AF-MF switch (when used with Four Thirds cameras this must be set to the same settings as the camera settings)
  • focus limiter: 0.38-0.52m; 0.52m-infinity; and full range
  • HSM AF allows manual focus in AF
  • 16 elements in 12 groups including APO
  • 80mm wide x 137mm long
  • 895g (200g lighter than the CanonEF180mmmacro
  • compatible with the two Sigma AF converters (1.4x, 2x)

reviews

    • 0.08% distortion
    • 0.5EV vignetting wide open at infinity reducing to 0.17EV at 1:1 macro
    • sharpest at f/5.6 but very sharp wide open
    • minimal CA of 0.23px
    • BUT “the sample lens suffered from a rather extreme degree of decentering which pollutes the resolution potential of the lens (on the left image side) - a rather worrysome quality control issue.”
    • 0.04% pincushion
    • good sharpness across the frame wide open
    • very low CA
    • ~0.7EV vignetting wide open
    • provides a very nice compromise in size, weight, working distance and cost in addition to focal length while retaining the f/2.8 aperture
photo/sigma150mmf2.8macro.txt · Last modified: 2014/07/07 13:20 by gary1