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Monday, December 7, 2015

Canon Patent - EF 200-600mm f/4.5-5.6 IS Lens

Egami, the Japanese photography blog has discovered a Canon patent for a EF 200-600mm f/4.5-5.6 IS zoom lens. Sigma and Tamron both have consumer grade 150-600mm lens on the market and they seem to sell quite well because of their low price.

Canon recently showed off the EF 600mm f/4 DO BR lens during the EXPO Show in September but it will be another Super Telephoto lens and may be out of reach for many photographers. An 'L' grade long zoom like the EF 200-600mm may be within reach for more buyers. Depending on weight, I may be interested in this lens if it comes to market but the EF 600mm f/4 DO BR is definitely on my buy list.

    Patent Publication No. 2015-212724
  •         Published 2015.11.26
  •         Filing date 2014.5.1

    Example 1
  •         Zoom ratio 3.00
  •         Focal length 200.00 340.00 600.00
  •         F-number 4.60 4.60 5.20
  •         Angle of view 6.18 3.64 2.07
  •         Image height 21.65 21.65 21.65
  •         Overall length of the lens 355.16 355.16 355.16
  •         BF 65.16 65.16 65.16

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