300patent 300x134 - Patent - EF 300 f/4L IS II
EF 300 f/4L IS II

Canon patent for EF 300 f/4L IS II

  • Patent Publication No. 2011-70032
  • Published 2011.4.7
  • Filled 2009.9.25


  • Focal Distance: 294
  • Fno: 4.14
  • Half angle of view:4.08
  • Image Height: 21.64
  • Lens Length (mm): 225
  • Back Focus (mm): 83.12
  • Aspherical: 1

Needed? Not really. However the 300 f/4L IS is a great performer and a decent seller for Canon. Adding updated IS to the lens would make most buyers very happy. Not sure it would be upgrade worthy.


Canon EF 300 f/4L IS $1399 at B&H

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