Patent: Canon RF 135mm f/1.4L DS USM optical formula

Last updated: December 29, 2021 11:45 am

Published: December 29, 2021

1 Min Read

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More optical formulas for large aperture RF mount prime lenses have appeared. This new patent showcases some RF mount prime lenses that utilize Defocus Smoothing, which first appeared in the RF 85mm f/1.2L USM DS.

Canon RF 24mm f/1.4L USM DS

Focal length: 24.55mm
F-Number: 1.45
Half angle of view: 41.39°
Image height: 21.64mm
Overall length: 119.13mm
BF: 38.01mm

Canon RF 50mm f/1.4L USM DS

Focal length: 52.13mm
F-Number: 1.45
Half angle of view: 22.54°
Image height: 21.64mm
Overall length: 85.51mm
BF: 37.71mm

Canon RF 135mm f/1.4L USM DS

Focal length: 131.00mm
F-Number: 1.41
Half angle of view: 9.38°
Image height: 21.64mm
Overall length: 182.28mm
Back focus: 13.87mm

TAGGED:RF 135 f/1.4L DS RF 24 f/1.4L DS RF 85 f/1.2L DS

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ByCraig Blair

Craig is the founder and editorial director for Canon Rumors. He has been writing about all things Canon for more than 17 years. When he's not writing, you can find him shooting professional basketball and travelling the world looking for the next wildlife adventure. The Canon EOS R1 is his camera of choice.