Three new Canon lens patents: 16-40mm f/4, 600mm f/5.6 and 55mm f/3.5
→ Canon EF 16-40mm f/4 USM lens
→ Canon EF-M 600mm f/5.6 DO IS lens (designed for APS-C mirrorless cameras)
→ Canon EF-M 55mm f/3.5 Macro STM lens (designed for APS-C mirrorless cameras)