Diffractive 200 f/2, 300 f/2.8, 400 f/2.8, 600 f/4 Patent

Last updated: May 6, 2025 4:42 am

Published: January 6, 2012

1 Min Read

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Patent literature, self-interpretation and summary
A lot of diffractive optics patents have come about over the years, and we have yet to see a new product to join the 400 f/4 DO or 70-300 DO. Canon obviously sees value in the technology as they continue to research it.

Patent Publication No. 2012-2999

2012.1.5 Release Date
Filing date 2010.6.16

Benefits of diffractive optical elements

Can simultaneously reduce the chromatic aberration correction and lens length
Perform light lens design
Canon's patented
Type Tele Photo
The first lens group
Aspherical surface having a diffraction
Reduce the number of lighter
Spherical aberration is corrected by using a non-
The second lens group
Inner Focus

Source: [EG]

TAGGED:diffractive optics patent

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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.