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Wednesday, December 7, 2016

Canon Patent - EF 600mm f/4 DO IS Lens

Canon EF 600mm f/4 DO BR lens

Canon is working on improving their Super Telephoto lens line with the aim of increasing image quality, focal length and decreasing weight. Their EF 400mm f/4 DO IS II is a fine example of this. I purchased the Series I model over 10 years ago but the Series II is a dramatic improvement and I expect more Diffractive Optics models will be announce in the years ahead.

The EF 600mm f/4 DO BR lens made an appearance in last year's Canon EXPO in New York City. This lens will be announced some time next year, in time for the 2018 Winter Olympics in South Korea. I am anxious to buy this lens. The patent for the Canon EF 600mm f/4 DO IS is listed below.

Patent publication number 2016-200685 (Google Translated)

  • Release date 2016.12.1
  • Application date 2015.4.9
  • Focal length 585.00
  • F number 4.12
  • Half angle of view (degree) 2.12
  • Image height 21.64
  • Lens total length 335.32
  • BF 66.92

Canon has big plans for the 2020 Summer Olympics in Tokyo, Japan. They will pull out all the stops and announce many exciting high and medium end cameras and lenses prior to that great occasion. Read my earlier post on Canon's roadmap for 2017 and beyond. Keep checking back for the latest information and development. You can see my Canon lens recommendationequipment bag and works on 

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