Tag Archives: Patents

Canon Patents 30mm f/2.8 DO Lens… for Full Frame Mirrorless?

Posted on 10 June 2016 by admin

Acording to the Egami Blog, Canon has patented the optical formula for a 30mm f/2.8 DO lens. However, the blog mentions that the lens has been designed for “Fullsize-Mirrorless,” indicating that Canon may be working on a camera system to … Continue reading →

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Canon Patents EF 28-560mm f/2.8-5.6 Optical Design

Posted on 22 May 2016 by admin

According to the Egami Blog, Canon has patented the optical design for an EF 28-560mm f/2.8-5.6. With full-frame coverage, a huge focal range and an f/5.6 maximum aperture at the lens’s longest extent, this would be a very enticing lens for … Continue reading →

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Sigma Patents 70-200mm f/2.8 DG OS HSM | Sports Lens Optical Design

Posted on 15 May 2016 by admin

According to the Egami Blog, Sigma has patented an optical formula for the 70-200mm f/2.8 DG OS HSM | Sports lens. Patent Description  Patent Publication No. 2016-75828 Published 2016.5.12 Submitted 2014.10.8 Zoom ratio 2.67 Focus distance 72.41 118.50 193.38 F-number 2.92 … Continue reading →

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Canon Patents EF & EF-M 50-300mm f/4.5-5.6 DO STM

Posted on 22 April 2016 by admin

According to the Egami Blog, Canon has patented an EF 50-300mm f/4.5-5.6 STM with diffractive optics and a similar EF-M version. Description of Patent  Patent Publication No. 2016-57444 Published 2016.4.21 Filing date 2014.9.9 EF Version Zoom ratio 5.59 Focal length 51.77 … Continue reading →

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