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A new EF-S 15-85mm f/3.5-5.6 STM coming (next APS-C kit lens)?

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EF-S 15-85mm f/3.5-5.6

Egami (translated) spotted a patent filed by Canon for an EF-S 15-85mm f/3.5-5.6 lens. This lens will replace the EF-S 15-85mm f/3.5-5.6 IS (released 2009). We got some rumors saying that this lens will come with STM on board. Egami itself suggests it could be the next kit lens for Canon’s high-end APS-C bodies.

Machine translated patent description:

  • Patent Publication No. 2015-75570
    • Published 2015.4.20
    • Filing date 2013.10.8
  • Example
    embodiment
    Example Zoom ratio Focal length Fno. Half angle Image height Overall length BF
    One 4.61 18.00 27.48 83.00 4.00 4.58 5.80 37.1 26.3 9.3 13.6 133.1 140.0 160.0 37.1 41.6 50.3
    Two 4.88 17.00 26.34 83.00 3.99 4.49 5.80 38.66 27.31 9.31 13.6 127.12 133.64 154.74 35.00 39.12 48.89
    Three 5.28 15.50 22.82 81.84 3.60 4.10 5.85 41.39 30.91 9.48 13.66 128.40 134.55 169.41 35.48 43.51 66.65
    Four 5.26 15.60 22.19 82.00 3.50 3.97 5.84 41.21 31.62 9.46 13.66 128.18 134.63 171.19 36.37 43.38 67.86

    Image height Y = 21.63mm

  • Canon patents
    • Positive and negative grain positive and negative positive 5-group configuration (Examples 1 and 2)
    • 4-group configuration of positive and negative grain-positive-positive (Examples 3 and 4)
    • Inner focus (the second group)
pipp
EF-S 15-85mm f/3.5-5.6 IS

 

 

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