<H1>New Canon Patent - EF 16-40mm f/4 Lens</H1>

Canon EF 17-40mm f/4L Lens

Egami has uncovered another Canon patent for the EF 16-40mm f/4 lens. The venerable EF 17-40mm f/4L could be in for a replacement in 2016. Canon has been making their new, shorter focal length 'L' lens bigger, case in point - the new EF 35mm f/1.4L II. The expected EF 16-35mm f/2.8L III, which is out in the field for testing, may also be slightly bigger than the current model.

Patent Publication No. 2015-206976 (Google Translated)

•     Published 2015.11.19
•     Filing date 2014.4.23
•     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

There has been a series of new patents discovered this year. Canon will be announcing more EF and EF-S lens in 2016.