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

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