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Sigma 30mm lenses for Micro Four Thirds


  • Sigma currently has 2 types of 30mm prime lenses for Micro Four Thirds

Sigma 30mm f/1.4 lens

  • announced 2016


  • 9 rounded blades
  • AF stepping motor
  • close focus 30cm
  • 52mm filter
  • 64.8×73.3mm
  • 265g
  • $US460?


    • better than the Panasonic 25mm f/1.4 DG in terms of edge sharpness, vignetting and distortion but not quite as sharp in the centre

Sigma 30mm f/2.8 EX DN asph lens

  • a very affordable lens with high quality optical performance with reasonably fast AF

version II lens

  • announced Jan 2013
  • “redesigned with enhanced optical performance and included as part of Sigma’s new Global Vision category restructuring”

version I lens

  • extremely sharp in the centre and reasonably sharp edges wide open but for best central sharpness use f/4 and for best edge sharpness, use f/5.6
  • slight barrel distortion at 0.8% should not be much of an issue
  • CA is well controlled
  • the main downsides are:
    • almost as big as the wider aperture Olympus m.ZD 45mm f/1.8 portrait lens which is a more useful lens to compliment a kit zoom lens
    • internal focusing elements move and rattle without power
    • takes 1-2secs to be activated once camera is turned on
  • why buy it when you have a kit lens covering this focal length?
    • wider aperture for lower light situations and improved ability to blur the background
    • nicer bokeh than most zoom lenses
    • sharper with less aberrations than consumer level zoom lenses
    • it is so cheap


  • 30mm focal length = 60mm in 35mm film terms = nice standard lens
  • f/2.8-f/22 aperture = an extra stop light and DOF performance compared to the kit lenses
  • 46mm filter size = consistent with many other a brief catalogue of Micro Four Thirds lenses
  • internal focusing
  • closest focus 30cm
  • 7 elements in 5 groups = high optical quality with lovely bokeh
  • 135g
  • 61mm x 39mm long


photo/sigmamft30mm.txt · Last modified: 2016/10/11 21:13 by gary1