Canon Patent for EF-S 9-20mm f/4.5-5.6 Lens for APS-C DSLRs

Canon filed a new patent in Japan. The new patent describes the EF-S 9-20mm f/4.5-5.6 wide-angle zoom lens designed for Canon DSLRs with APS-c image sensors.

From the patent application, we can say this lens looks very similar to the new EF-S 10-18mm f/4.5-5.6 IS STM lens  (see samples) which is also designed for APS-c DSLRs. If the patent becomes live in production, this 9-20mm lens will have a longer and wider zoom range than the 10-18mm.

The Canon EF-S 10-18mm f/4.5-5.6 IS STM Lens price is $299. See patent details below.

Canon EF-S 9-20mm f/4.5-5.6 Lens Patent for APS-C DSLRs

The described optical formula refers to an APS-C sensor.

• Patent Publication No. 2015-31869
  • Published 2015.2.16
  • Filing date 2013.8.5
• Example
  • Zoom ratio 2.07
  • Focal length 9.50 14.52 19.70
  • F-number 4.64 5.21 5.80
  • Half angle (in degrees) 55.17 43.26 34.74
  • Image height 13.66
  • Overall length of the lens 143.95 134.71 134.11
  • BF 38.00 47.58 56.42

via Egami