Canon EF 1000mm F5.6 DO lens coming, filed patent suggests [CW3]

Among all the patents filed by Canon, this may be one that actually could hit the market (in my opinion). The patent refers to an EF 1000mm F5.6 DO (Diffractive Optics) lens. Would be perfect for the upcoming Olympic Games :-) Who knows…maybe Canon is already field-testing this lens.

• Patent Publication No. 2016-102852
  • Published 2016.6.2
  • Filing date 2014.11.27
• Example
  • Zoom ratio 1.00
  • Focal length 950.00
  • F-number 5.80
  • Angle of view 1.30
  • Image height 21.64
  • Overall length of the lens 485.94
  • BF 0.40
• Canon patent
  • Positive and negative Shibomake
  • Diffractive optical element (first group)
  • Inner focus (the second group)