Canon Patent for EF-S 17-55 f/3.5-5.6 IS STM Kit Lens

Egami spotted another patent filed by Canon. The new patent describes the EF-S 17-55 f/3.5-5.6 IS STM lens which looks like to be a new kit lens for APS-C sensor Canon DSLRs.

Canon EF-S 17-55 f/3.5-5.6 IS STM lens could be announced this year as a replacement for the current EF-S 18-55mm f/3.5-5.6 IS STM lens. The new 17-55 kit lens could also be waiting to be announced from last year. Also there is an example for the 18-55mm kit version.

Below are the patent details translated by machine.

Canon Patent for EF-S 17-55 f/3.5-5.6 IS STM Lens


Description and self-interpretation of the patent literature

  • Patent Publication No. 2014-21258
    • Publication date 2014.2.3
    • Filing date 2012.7.18
  • Example 2
    • Zoom ratio 2.92
    • Focal length f = 18.50-32.89-54.00mm
    • Fno. 3.49-4.39-5.80
    • Half angle ω = 36.44-22.55-14.20 °
    • Image height Y = 13.66mm
    • 119.77-110.06-120.23mm overall length of the lens
    • BF 37.98-52.51-74.3mm
  • Example 3
    • Zoom ratio 3.09
    • Focal length f = 17.50-32.05-54.00mm
    • Fno. 3.47-4.38-5.80
    • Half angle ω = 37.97-23.08-14.20 °
    • Image height Y = 13.66mm
    • 119.55-108.81-118.68mm overall length of the lens
    • BF 36.59-51.53-73.93mm
  • Canon patents
    • 4-group zoom of positive and negative positive negative
    • Inner folder – Kas (Group 3)
    • The fourth lens unit can also be used for anti-vibration

via EG

Macphun's all-in-one photo editor Luminar 2018 is out now and available for just $69 for new users, with big discounts for upgrading users. We rated Luminar as "Highly Recommended".

Use coupon code "CAMERANEWS" to save another $10 on Luminar. Download Luminar 2018