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 system: 18-40mm 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.

Canon Files Patent For Automated Auto-Focus Microadjustement

Auto-Focus Microadjustement

Source: Egami (translated)

Canon filed a patent for automatic auto-focus microadjustement of lenses. Pretty cool feature that I would like to see on my DSLRs.

Patent description:

  • Patent Publication No. 2013-254194
    • Publication date 2013.12.19
    • Filing date 2012.5.11
  • Issues surrounding the AF adjustment
    • The looseness of the phase difference AF sensor, because the AF accuracy is worse, need AF adjustment
    • It is not done correctly the AF adjustment in your environment
    • Necessary facilities such as service center
  • Canon patents
    • Automation of the AF adjustment
    • Procedure
      • Let me be the difference adjusted value of the phase difference AF and contrast AF
      • To determine the reliability

Canon Patent for PowerShot with 100x Zoom

Egami (translated) spotted a patent filed by Canon that appears to be for a PowerShot with a 100x zoom. 18mm-1768mm equivalent.

  • Patent Publication No. 2013-242430,2013-242431
    • Publication date 2013.12.5
    • Filing date 2012.5.21
  • Example 2
    • Zoom ratio 48.37
    • Focal length f = 4.30-13.30-208.00mm
    • Fno. 2.87-5.00-7.07
    • Half angle ω = 37.77-16.25-1.07 °
    • 94.75-94.56-138.99mm overall length of the lens
    • BF 10.40-19.43-10.43mm
    • 13 pieces of 10-group lens configuration
    • Two four-sided aspherical
  • Example 5
    • Zoom ratio 94.44
    • Focal length f = 3.60-14.51-340.00mm
    • Fno. 3.50-5.00-9.00
    • Half angle ω = 42.12-14.95-0.65 °
    • 95.91-97.40-165.41mm overall length of the lens
    • BF 10.48-21.86-2.28mm
    • 13 pieces of 10-group lens configuration
    • Three 5-sided aspherical

Canon Patent For Motorized Mirror Unit (more miniaturized DSLRs on the way?)

Egami (translated) spotted a patent filed by Canon for a motorized mirror return mechanism. The advantages of such a mirror system are less vibration, and the possibility to miniaturize the whole thing. The solution described in the patent opens the way for a DSLR that is smaller than the Canon Rebel SL1/EOS 100D. The drawback is that such a mechanism can not achieve the same fps rate as classic mirror mechanism.

  • Patent Publication No. 2013-242416
    • Publication date 2013.12.5
    • Filing date 2012.5.21
  • Canon patents
    • (Axis of the spiral on the motor shaft) lead screw
    • Quick return mirror that moves with the rotation of the lead screw