Canon Patent for EF-S 55-200mm f/4-6.3 STM Lens

Canon filed a new patent in Japan. The new patent describes the EF-S 55-200mm f/4-6.3 STM lens which looks like to be a new budget-friendly zoom lens for APS-C sensor Canon DSLRs.

The patent application shows the details of a zoom lens covers a popular range starting from 55 to 200mm. We can also say the upcoming EF-S 55-200mm f/4-6.3 lens will feature STM motor for silent and fast AF operation.

If the lens becomes available into production, it will be a budget zoom lens for EOS 7D Mark II and EOS 70D camera users. See the EF-S 55-200mm f/4-6.3 STM lens patent details.

Canon EF-S 55-200mm f/4-6.3 STM Lens Patent

• Patent Publication No. 2015-197655
  • Published 2015.11.9
  • Filing date 2014.4.3
• Example 1
  • Zoom ratio 3.68
  • Focal length 54.36 133.00 199.99
  • F-number 4.14 5.22 6.32
  • Half angle of 14.11 5.86 3.91
  • Image height 13.66
  • Overall length of the lens 129.39 161.77 167.04
  • BF 46.78 66.90 78.18

via: Egami