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

More after the break.

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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

Canon Patent For New EOS M Pancake Lenses (18-40, 18-55, 10-20, 9-18)

EOS M Pancake

EOS M Pancake

Egami (tranlated) spotted a patent filed by Canon that appears to refer to new pancake lenses for the EOS M system18-40mm f/3.5-5.6, 18-55mm f/4-8, 10-20mm f/4-5.6, and 9-18mm f/4-5.6.

  • Patent Publication No. 2014-6275
    • Publication date 2014.1.16
    • Filing date 2012.6.21
  • Example 1
    • Zoom ratio 2.28
    • Focal length f = 18.10-29.78-41.20mm
    • Fno. 3.60-4.70-5.88
    • Half angle ω = 36.92-24.55-18.27 °
    • Image height Y = 13.60mm
    • 54.22-49.85-51.81mm lens length
    • BF 0.50mm
  • Example 7
    • Zoom ratio 3.00
    • Focal length f = 18.10-37.01-54.30mm
    • Fno. 4.20-6.20-8.20
    • Half angle ω = 36.92-20.17-14.06 °
    • Image height Y = 13.60mm
    • 64.74-56.63-62.13mm lens length
    • BF 0.50mm
  • Example 8
    • Zoom ratio 1.91
    • Focal length f = 10.30-15.00-19.70mm
    • Fno. 3.90-4.83-5.76
    • Half angle ω = 52.98-42.31-34.74 °
    • Image height Y = 13.66mm
    • 58.84-53.45-52.25mm lens length
    • BF 0.50mm
  • Example 10
    • Zoom ratio 1.91
    • Focal length f = 9.27-13.49-17.71mm
    • Fno. 4.12-4.93-5.76
    • Half angle ω = 55.84-45.36-37.65 °
    • Image height Y = 13.66mm
    • 60.98-55.27-53.91mm lens length
    • BF 0.50mm
  • Canon patents
    • The possible vibration damping by the second lens group
    • Feeding whole, front focus, focusing, rear focusing, etc.