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