Three new Canon lens patents: 16-40mm f/4, 600mm f/5.6 and 55mm f/3.5

Canon-EF-16-40mm-f4-USM-lens-patent
→ Canon EF 16-40mm f/4 USM lens

Canon EF-M 600mm f:5.6 DO IS lens patent
→ Canon EF-M 600mm f/5.6 DO IS lens (designed for APS-C mirrorless cameras)

Canon-EF-M-55mm-f3.5-Macro-STM-lens-patent
→ Canon EF-M 55mm f/3.5 Macro STM lens (designed for APS-C mirrorless cameras)

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