Canon Patent for 17-55mm and 18-55mm STM Lenses (new kit lenses?)

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Egami (translated) found a patent filed by Canon that appears to refer to new kit lenses: 17-55mm f/3.5-5.6 STM and 18-55mm f/3.5-5.6 STM. s you can see both lenses feature Canon’s newer STM (stepping motor) technology to drive the lens. STM is almost silent when operating, hence useful for videography.

  • 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

Canon Patent For 70-400 f/4.5-5.6 Lens

2014_21256_fig05

Egami (translated) spotted another patent filed by Canon. It appears that Canon is working on a 70-400mm f/4.5-5.6 lens.

  • Patent Publication No. 2014-21256,2014-21257
    • Publication date 2014.2.3
    • Filing date 2012.7.18
  • Example 2
    • Zoom ratio 5.45
    • Focal length f = 71.33-144.71-388.95mm
    • Fno. 4.63-4.84-5.83
    • Half angle ω = 16.87-8.50-3.18 °
    • Image height Y = 21.64
    • 240.00-284.68-303.83mm overall length of the lens
    • BF 75.92-79.30-95.93mm
    • 6-group zoom of positive and negative positive and negative positive and negative
    • (Part of the fourth group) anti-vibration
    • Rear Focus (Group 6)

Canon Patent For Ring Flash With Prism For Uniform Light Distribution

Canon Patent

Egami (translated) spotted another patent filed by Canon, this time for a ring flash with a prism for an uniform distribution of the light.

  • Patent Publication No. 2014-13350
    • Publication date 2014.1.23
    • Filing date 2012.7.5
  • Existing ring strobe
    • Xenon tube
    • Process to bend the arc shaped glass tube cylindrical difficult
  • Canon patents
    • There are two areas in light of the strobe
    • Light flux from the first region is subject to direct
    • Toward the object light beam from the second zone enters the prism, and then reflected inside
    • Provided with a step stepped on the reflecting surface, by changing the pitch of the step, it is possible to adjust the distance between the emission point

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Canon Patent for Curved Diaphragm

Curved Diaphragm Curved Diaphragm

Egami (translated) spotted another patent filed by Canon (we had more Canon patents lately: 1 | 2 | 3).

The patent refers to the implementation of a curved diaphragm. I guess this could be very useful for miniaturization purposes. Is there another super-small DSLR like the Rebel Sl1 (price & specs) coming?

  • Patent Publication No. 2014-13363,2014-13365
    • Publication date 2014.1.23
    • Filing date 2012.6.6
  • Canon patents
    • The iris of the dome-shaped

Canon Patent for 11-24mm f/4 Lens

2014_10286_fig01

Egami (translated) spotted a patent filed by Canon for an 11-24mm f/4 wide-angle lens for full-frame sensors.

  • Patent Publication No. 2014-10286
    • Publication date 2014.1.20
    • Filing date 2012.6.29
  • Example 1
    • Zoom ratio 2.06
    • Focal length f = 11.30-18.00-23.30mm
    • Fno. 4.10
    • Half angle ω = 62.42-50.24-42.88mm
    • Image height Y = 21.64mm
    • 172.19-161.28-162.86mm overall length of the lens
    • BF 38.82-52.31-63.15mm

Canon Patent for Image Stabilized 85mm, 100mm, and 135mm Lenses

Egami (translated) spotted more patents filed by Canon. This time for image stabilized 85mm f/1.8, 100mm f/2, and 135mm f/2.8 lenses.

  • Patent Publication No. 2014-10283
    • Publication date 2014.1.20
    • Filing date 2012.6.29
  • Example 1
    • Focal length f = 85.56mm
    • Fno. 1.86
    • Angle of view 2ω = 28.4 °
    • Image height Y = 21.635mm
  • Example 2
    • Focal length f = 102.06mm
    • Fno. 2.00
    • Angle of view 2ω = 23.9 °
    • Image height Y = 21.635mm
  • Example 3
    • Focal length f = 131.00mm
    • Fno. 2.80
    • Angle of view 2ω = 18.8 °
    • Image height Y = 21.635mm
  • Canon patents
    • Positive and negative positive
    • Inner Focus (group 2)
    • (Part of the third group) anti vibration