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Canon Patent Application: 16-40, 14-40mm F.40 UWA Zooms
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Canon Patent Application: 16-40, 14-40mm F.40 UWA Zooms

In yet another patent application for the Canon RF mount, we have more optical designs for an F4.0 Ultra wide lens.

This patent application features embodiments for around two focal length zooms; 14-40, 16-40.  Both of these lenses are constant F4.0

Examples of the embodiments include;

Focal distance 14.43 21.62 40.74 
F number 4.12 4.12 4.12 
Half field angle 56.30 45.01 27.97 
Image height 21.64 21.64 21.64 
Whole length of the lens 138.31 128.15 129.29 
BF 12.84 12.84 12.84

Focal distance 16.41 23.12 38.80 
F number 4.12 4.12 4.12 
Half field angle 52.82 43.10 29.14 
Image height 21.64 21.64 21.64 
Whole length of the lens 118.88 112.53 114.89 
BF 12.78 12.78 12.78 

Japan Patent Application 2019-066653

Previous Article Canon Patent Application: Canon RF 15-35 F4.0, Canon RF 16-35 F4.0
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