New Patent: Canon EF 70-200mm f/2.8 DO Lens

Canon EF 70-200mm F2.8 DO lens patent

Canon has just filed a new patent for EF 70-200mm f/2.8 DO (Diffractive Optics) lens. This is the third 70-200mm F2.8 lens after the current EF 70-200mm F2.8L II and is rumored to be announced before 2020.

Canon EF 70-200mm F2.8 L II USM

the current Canon EF 70-200mm f/2.8L IS II USM

Detail translated by Google:

  • Patent Publication No. 2016-80877
    • Published 2016.5.16
    • Filing date 2014.10.17
  • Example
    • Focal length  72.15 134.00 193.98
    • Zoom ratio 2.69
    • F-number 2.91 2.91 2.91
    • Half angle of 16.69 9.17 6.36
    • Image height 21.64
    • Overall length of the lens 223.50 223.50 223.50
    • BF 45.35 45.35 45.35

Source: EGAMI

Read More Canon Lens Patent

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