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Canon Patents

Patent: Coating for ND Filter from Canon

By Canon Rumors | November 25, 2015

Is Canon getting further into the filter business? A patent for a new coating on an ND filter has been published. The coating is to help minimize¬†ghosting. Patent Publication No. 2015-200805 (Google Translated) Published 2015.11.12 Filing date 2014.4.9 On the surface of the transparent substrate made of synthetic resin, deposited the inorganic hard film of Read more…

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Patent: 25-125mm T/2.8 Cinema Lens

By Canon Rumors | November 23, 2015

A patent for a new cinema lens optical formula has appeared. It’s for a 25-125mm t/2.8. Patent Publication No. 2015-176118 (Google Translated) Published 2015.10.5 Filing date 2014.3.18 Zoom ratio 5.00 Focal length 25.00 125.00 F-number 2.90 Half angle (in degrees) 29.42 6.44 Image height 14.10 Overall length of the lens 446.92 BF 50.00 Expect to Read more…

Patent: EF 20-45mm f/2.8-4

By Canon Rumors | November 20, 2015

A patent for an optical formula of 20-45mm f/2.8-4 has appeared. As suggested at Northlight, this sort of optical formula could end up being a 17-40 type of replacement, or even part of the new EF 16-35 f/2.8L II development. Patent Publication No. 2015-197593 (Google Translated) Published 2015.11.9 Filing date 2014.4.1 Zoom ratio 2.25 Focal Read more…

Patent: Canon EF 24-300mm f/4-5.6

By Canon Rumors | November 13, 2015

We’ve posted recently that Canon has been working on a new superzoom lens, and sure enough a patent for an EF 24-300 f/4-5.6 has appeared. Patent Publication No. 2015-200870 (Google Translated) Published 2015.11.12 Filing date 2014.3.31 Example 1 Zoom ratio 12.14 Focal length 24.30 99.98 294.95 F-number 4.10 5.76 5.88 Half angle (in degrees) 41.68 Read more…

Patent: A Different Take on the EVF

By Canon Rumors | October 19, 2015

An odd patent for an EVF. It looks like if you move the eyepiece to the LCD screen, it’ll change display area to just show there. Once the eyepiece is off the screen, it’ll go back to a full screen LCD. While I don’t imagine the screen is as high resolution as most EVFs, this Read more…

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