Canon Patent for EF-M 70-400mm f/4.5-7.2 STM Lens

Egami has discovered a new patent filed by Canon. The new patent describes a EF-M 70-400mm f/4.5-7.2 STM lens which is designed for EOS-M mirrorless system cameras.

If the patent becomes live in production, it will be the first super-telephoto in the EOS-M system. This patent also a sign that the company still committed to the system.

The patent for the EF-M 70-400mm f/4.5-7.2 STM telephoto lens for APS-C mirrorless cameras can be seen below.

Canon EF-M 70-400mm f/4.5-7.2 STM Lens Patent

• Patent Publication No. 2014-228734 (Google Translated)
  • Published 2014.12.8
  • Filing date 2013.5.23
• Example 3
  • Zoom ratio 5.58
  • The focal length f = 69.59-251.52-388.00mm
  • Fno. 4.68-6.30-7.00
  • Half angle ω = 11.11-3.11-2.02 °
  • Image height 13.66mm
  • Overall length of the lens 155.01-227.97-240.02mm
  • BF 15.81-37.15-46.87mm
  • Inner focus

via Egami