Canon Files Patent for 16-40mm f/4 Lens Design

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According to the Egami Blog, Canon has filed a patent for a 16-40mm f/4 lens design.
 
Might the EF 17-40mm f/4L USM‘s successor be in the works with an even wider focal length? Only time will tell.
 
From the Egami Blog (Google translated):
 
Description of the patent literature
 
Patent Publication No. 2015-206976
 

  • Published 2015.11.19
  • Filing date 2014.4.23

Example
 

  • Zoom ratio 2.36
  • Focal length 16.48 24.40 38.90
  • F-number 4.12 4.12 4.12
  • Half angle (in degrees) 52.70 41.56 29.08
  • Image height 21.64
  • Overall length of the lens 177.74 162.40 159.73
  • BF 38.00 45.51 63.40

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