Patent: Canon EF 11mm f/4 Optical Formula

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A patent showing an optical formula for an EF 11mm f/4 has appeared, and we think it was likely part of the EF 11-24 f/4L development. Patent Publication No. 2016-81005 (Google Translated) Published 2016.5.16 Filing date 2014.10.22 Focal length 11.33 11.47 F-number 4.11 4.12 Half angle of 62.36 62.08 Image height 21.64 21.64 Overall length Read ...
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Auteur : Canon Rumors
Editeur : Canon Rumors
Catégorie : patent

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