Canon New Patent: EF 600mm f/4 DO IS USM

ef 400mm f4 do is ii usm lens
EF 400mm f/4 DO IS II USM Lens

Canon recently filed a new lens patent for EF 600mm f/4 DO IS USM lens. This is another super telephoto prime DO lens. Last year, Canon announced the EF 400mm f/4 DO IS II USM lens, price for $6,899, currently in stock at Amazon.

EF 600mm f/4 DO IS USM Lens Patent:

2015_11171_fig03

 

  • Patent Publication No. 2015-11171
    • Published 2015.1.19
    • Filing date 2013.6.28
  • Example 2
    • Focal length 588.30mm
    • Fno. 4.12
    • Angle of view 2.11 °
    • Image height 21.64mm
    • Lens length 397.80mm
    • BF 2.02mm
    • Positive ShiboTadashi
    • Inner focus
    • Vibration control

Back in 2013, Canon already filed this lens patent:

600mm f/4
600mm f/4 DO

via: EG

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