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Kenko / Tokina 300mm f/6.3 macro mirror lens for MFT


  • this super telephoto lens introduced in 2011?? is a catadioptric mirror lens, and as with all such mirror lenses, share the following characteristics:
    • manual focus
    • fixed aperture (in this case f/6.3)
    • virtual elimination of chromatic aberration as uses mirror rather than lenses
      • also means focus position for infrared photography is the same as for light photography
    • central mirror:
      • allows much more compact lens length as the optic path is reflected internally twice
      • by necessity, blocks some of the light and thus causes:
        • decrease in image contrast
        • characteristic “doughnut” shaped bokeh imagery in out of focus areas


  • 300mm focal length and field of view (4° on Micro Four Thirds 2x crop) at infinity focus
  • fixed f/6.3 aperture
  • 13 lens elements, 11 groups (multicoated)
  • closest focus 0.88m (1:2 macro)
  • 55mm filter thread
  • mm diameter, 66mm long and 298g
  • cropped sensor camera mounts only - eg. Micro Four Thirds system (not full frame)
  • ~$199


photo/tokina300mmf6.3.txt · Last modified: 2014/05/18 17:07 by gary1

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