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A patent application showing the optical formula for an EF 10mm f/2.8 prime lens has been filed in Japan. Japan Patent Application 2018-233223:
EF lens development seems to be continuing, even if we don’t get any new EF lenses for a while. Photography via Canon Rumors https://ift.tt/2v4dYqS March 14, 2019 at 08:42AM
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