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Canon Patent: 28-70mm f/2.8 And 28-60mm f/4 Lenses For RF Mount

canonwatch.com
 2021-11-19

Cover picture for the articleAnd yet another Canon patent application for lenses for the RF mount (EOS R). Canon patent application 2021-179550A (Japan, spotted by Hi Lows Note) discusses optical formulas for a 28-70mm f/2.8 and a 28-60mm f/4 lens, both for full frame mirrorless cameras (hence for the RF...

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