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

     

Canon Patent for EOS M System Adapter (with accessory shoe and can get a grip mounted on)

EOS M System Adapter

Back in October Egami (translated) spotted a pretty interesting patent filed by Canon: an adapter for the EOS M system that not only can be used to attach lenses with a different mount type (back-focus), but also has an accessory shoe and can get a grip attached to. WOW! What’s that?

Is this for the pro-oriented EOS M camera that is rumored? The patent was filed in April 2012. I am curious if this piece of gear will ever hit the shelves. This adapter would open a world of possibilities on the EOS M system, especially because of the accessory shoe which could accommodate an EVF (?), or an external microphone. I guess the grip will be useful with big lenses attached to. Looking at the pic below it seems as if a battery pack is attached to the adapter.

[via eos-m world]

EOS M System Adapter

Canon Patent for 200-400mm Teleconverter Lens

Canon Patent

Source: Egami (translated).

Canon filed a patent for a 200-400mm lens with built-in teleconverter and image stabilisation.

  • Patent Publication No. 2013-238827
    • Publication date 2013.11.28
    • Filing date 2012.5.17
  • Example 1
    • Zoom ratio 1.90
    • Focal length f = 205.00 – 389.99mm
    • Fno. 4.12
    • Half angle ω = 6.02 – 3.18 °
    • Image height Y = 21.64mm
    • The overall length of the lens 389.84mm
    • BF 68.49mm
    • Teleconference insertion
      • Focal length f = 287.00 – 545.98mm
      • Fno. 5.77
      • Half angle ω = 4.31 – 2.27 °
  • Example 2
    • Focal length f = 585.10mm
    • Fno. 4.12
    • Half angle ω = 2.12 °
    • Image height Y = 21.64mm
    • The overall length of the lens 467.32mm
    • BF 83.15mm
    • Teleconference insertion
      • Focal length f = 819.00mm
      • Fno. 5.77
      • Half angle ω = 1.51 °
  • Example 3
    • Zoom ratio 1.90
    • Focal length f = 307.50 – 585.00mm
    • Fno. 5.88
    • Half angle ω = 4.02 – 2.12 °
    • Image height Y = 21.64mm
    • The overall length of the lens 405.00mm
    • BF 75.70mm
    • Teleconference insertion
      • Focal length f = 427.00 – 812.33mm
      • Fno. 8.17
      • Half angle ω = 2.90 – 1.53 °
  • Canon patents
    • Teleconverter BF is the same in insertion and after insertion before
    • Vibration control
    • Teleconference to be inserted into the appropriate location, teleconverter can be miniaturised

Canon Patent