A patent showing three different optical formulas for APS-C sensor cameras has appeared.
According to Canon News, this patent is missing some good information that would help narrow down what these embodiments are for.
The 3 embodiments:
- 15-45mm f/2.8-5.6
- 15-45mm f/2.0-5.0
- 15-60mm f/2.0-5.0
From Canon News:
Our assumption with this patent application is that these lenses are for APS-C given the focal lengths of the lenses, however in this patent application, unlike most, the half image width is curiously missing from the patent application. This could be for a mirrorless EF-M camera, or even a APS-C compact camera. It's hard to tell without the image half width. The patent description seems to be talking more about a compact camera.
It looks like the 15-60mm f/2.0-5.0 has an extremely short back focus suggesting it may be for a PowerShot application and not for mirrorless or APS-C DSLRs.
We wouldn't be shocked to see a new EF-M 15-45mm lens announced alongside the EOS M5 Mark II, as we've been told that a new kit lens of some kind is on the way.