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07-31-2017, 02:34 PM - 1 Like   #16
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QuoteOriginally posted by zapp Quote
Coming back to the orginal question. 2.8/300 vs 4/300 at f/5.6 - I see no real advantage for the old FA* lens.
Missing points are:

Pro for the FA* 300mm 2.8:
  • AF-Limiter (very helpful for outdoors/wildlife)
  • Fast AF-Speed (one of the fastest Pentax AF-Lenses)
  • fast 2.8 aperture (great bokeh, narrow shallow of depth)
  • In-Camera Correction for Distortion, Peripheral Illumin., Lateral Chromatic Aberration, Diffraction

Con for the FA* 300mm 2.8:

  • no weather sealing
  • no QuickShift
  • 2.495kg weight (around 1.4kg more than the DA* 300)
  • only available used



Pro for the DA* 300mm 4.0:
  • WR (dust-resistant and drip-proof construction)
  • Still build and available to order
  • just 1.040g weight
  • In-Camera Correction for Distortion, Peripheral Illumin., Lateral Chromatic Aberration, Diffraction

Con for the DA* 300m 4.0:
  • slower f4 aperture
  • slower SDM AF
  • no AF-Limiter (AF hunting is common, not good for wildlife)
  • no aperture ring


QuoteOriginally posted by zapp Quote
Anyways: Pentax is lacking TCs as well as any modern design super telephoto lens.
Pentax has the FA 1.7x AF converter as well as the HD DA 1.4x AW converter.
Current line up includes two super telephoto lenses:
  • HD DA 560mm 5.6 DC AW
  • HD D FA 150-450mm 4-5.6 DC AW



Last edited by angerdan; 08-18-2017 at 03:49 PM.
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