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Canon Patents

Crazy Patent: Canon EF 40-800mm f/4.5-5.6

By Canon Rumors | July 20, 2016

Here’s a crazy optical formula patent from Canon, an EF 40-800mm f/4.5-5.6 superzoom lens. The folks at Egami say it’s for a full frame DSLR and is an internal zoom lens. Patent Publication No. 2016-128846 (Google Translated) Published 2016.7.14 Filing date 2015.1.9 Zoom ratio 19.42 Focal length 41.09 92.80 152.20 225.00 797.99 F-number 4.67 4.66 Read more…

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Patent: Canon 15-75mm f/2-5.6 for APS-C PowerShot?

By Canon Rumors | July 18, 2016

A patent showing an optical formula for a Canon 15-75mm f/2-5.6 for what appears to be an APS-C fixes lens application has appeared. Could Canon be readying a new APS-C PowerShot camera? More after the break.

Patent: Improved Detection of AF Errors

By Canon Rumors | July 11, 2016

A patent showing an improved AF accuracy concept has appeared, and Northlight has shed some light on what it’s all about. It’s a way of improving detection of AF errors without changing the lens focus, as in the ‘hunting’ that Contrast AF does. Uses polarising filters on a plate in front of the pixels. More Read more…

Patent: EF-M 16-50mm f/3.5-5.6

By Canon Rumors | July 6, 2016

A patent showing an optical formula for a new EF-M 16-50mm f/3.5-5.6 lens has appeared, therefore this is for an APS-C sensor. Patent Publication No. 2016-118658 (Google Translated) Published 2016.6.30 Filing date 2014.12.22 Zoom ratio 2.88 Focal length 16.51 21.00 47.49 F-number 3.49 3.77 5.80 Half angle of view (degrees) 39.61 33.04 16.05 Image height Read more…

Patent: Canon 70-200mm f/2.8 DO

By Canon Rumors | June 20, 2016

A patent showing another optical formula for a diffractive optics lens has appeared, this time in the form of a 70-200mm f/2.8 DO. Most of the patent seems to talk about this lens for video applications. Patent Publication No. 2016-80877 Published 2016.5.16 Filing date 2014.10.17 Zoom ratio 2.69 Focal length 72.15 134.00 193.98 F-number 2.91 Read more…

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