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Sigma 19mm f/2.8 EX DN asph lens for Micro Four Thirds

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  • a very affordable lens ($US199) with high quality optical performance with reasonably fast AF and compact size makes for a great street photography or party lens (when used with an external bounce flash)

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

  • great flare control, bokeh, sharpness
  • extremely sharp in the centre and reasonably sharp edges wide open but for best edge sharpness, use f/5.6-f/8
  • slightly high barrel distortion at 1.1% but this is correctable
  • CA (~0.8px) is reasonably well controlled
  • it is probably a better choice than the Panasonic Lumix 20mm f/1.7 pancake lens when used on Olympus cameras as:
    • Olympus cameras have IS built in and this helps reduce the need for f/1.7 in many situations
    • the background blurring capability of Panasonic Lumix 20mm f/1.7 pancake lens, although more blurred, gives less nice bokeh
    • Olympus cameras do not correct the higher levels of CA (1.5px), vignetting (1.5EV) and barrel distortion (3.3%) found on the Panasonic Lumix 20mm f/1.7 pancake lens
    • has faster, quieter AF and is cheaper
  • the main downsides are:
    • some barrel distortion
    • 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



photo/sigmamft19mm.txt · Last modified: 2013/01/30 00:58 by gary1

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