Archive for the ‘Canon Patents’ Category

Patent: Canon 11-24mm f/4 Lens

Patent: Canon 11-24mm f/4 Lens

Egami has shown that Canon has filed a patent for an ultra-wide angle zoom:

(Translated)

Description and self-interpretation of the patent literature

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 users have been left out in this focal range for quite some time. With Nikon and their legendary 14-24mm f/2.8G ED and other third party offerings filling up the gap in the market. Can Canon produce an optically superior lens that also has such a shallow depth of field? Until they do, the only wide-angle zooms that Canon makes that come close are the 16-35 f/2.8 L II or the 8-15mm f/4L Fisheye.

    [Egami]

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    Patents: Canon 85mm f/1.8 IS, 100mm f/2 IS, 135 f/2.8 IS

    Patents: Canon 85mm f/1.8 IS, 100mm f/2 IS, 135 f/2.8 IS

    Patents with three popular telephoto lenses with the addition of image stabilization have shown up. It’s long been expected to see IS added to Canons highly regarded 135 f/2.0, I don’t know where a 2.8 will fit into the lineup, and adding stabilization to the 85 and 100 would follow with Canons current practice of sticking IS on all their mid-range glass.

    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) antivibration

    Source: [EG]

    Update: I accidentally read the135 f/2.8 as f/2.0, apologies for any potential false hope we brought.

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    Patent: EF-M 18-40 Pancake

    Patent: EF-M 18-40 Pancake

    A patent showing an EF-M 18-40  f/3.5-5.6 pancake has come to light. With this patent a bunch of other optical formulas also appear, such as an 18-55 pancake, 10-20, and a 9-18. We currently have an EF-M 11-22, which is probably rooted from the latter two optical formulas.

    A zoom pancake would be a nice addition to the geographically fragmented and oddly marketed EOS M line.

    • Patent Publication No. 2014-6275
      • Publication date 2014.1.16
      • Filing date 2012.6.21
    • 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
    • Canon patents
      • The possible vibration damping by the second lens group
      • Feeding whole, front focus, focusing, rear focusing, etc.

    Source: [EG]

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    Patent: Microadjustment Automated

    Patent: Microadjustment Automated

    A patent has been published outlining automatic microadjustment for Canon DSLRs and lenses. This would definitely be a handy feature going forward. Especially if you rent lenses.

    • 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

    Source: [EG]

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    Patent: 16-120mm f/3.5-5.6 IS STM

    Patent: 16-120mm f/3.5-5.6 IS STM

    The following patent is most likely for the EF-M range of lenses. Also appearing alongside the 16-120 IS STM in the patent is an 18-55 IS STM and an 18-200 f/3.5-6.3 IS STM.

    • Patent Publication No. 2013-257507
      • Publication date 2013.12.26
      • Filing date 2012.6.14
    • Example 1
      • Zoom ratio 2.87
      • Focal length f = 18.58 – 27.82 – 53.36mm
      • Fno 3.60 -. 4.27 – 5.69
      • Half angle ω = 36.33 – 26.15 – 14.36 °
      • Image height Y = 13.66mm
      • 86.23 – - 104.79mm 78.22 overall length of the lens
      • BF 0.50mm
      • 13 pieces of 11-group lens configuration
      • Three four-sided aspherical
    • Example 3
      • Zoom ratio 10.39
      • Focal length f = 18.60 – 60.12 – 193.23mm
      • Fno 3.55 -. 5.59 – 6.60
      • Half angle ω = 36.29 – 12.80 – 4.04 °
      • Image height Y = 13.66mm
      • 151.48 – - 184.39mm 118.58 overall length of the lens
      • BF 0.50mm
      • 18 pieces of 14-group lens configuration
      • Three three-sided aspherical
      • One UD glass
    • Example 4
      • Zoom ratio 7.14
      • 51.87 – - 117.70mm 16.48 focal length
      • Fno 3.60 -. 5.30 – 5.88
      • Half angle ω = 39.65 – 14.75 – 6.62 °
      • Image height Y = 13.66mm
      • 138.55 – - 162.35mm 114.75 overall length of the lens
      • BF 0.50mm
      • 17 pieces of 13-group lens configuration
      • Two two-sided aspherical
      • One UD glass
    • Canon patents
      • Vibration control
      • Inner focus

    Source: [EG]

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    Who’s Ready for a 100x Zoom PowerShot?

    Who’s Ready for a 100x Zoom PowerShot?

    The future of the SX line?
    Canon has patented a 100x zoom lens for compact cameras. It has a focal range of 3.6mm to 340mm. With the crop factor of 5.2 for a 1/2.3″ sensor, that’s about an 18mm-1768mm lens!

    I’ve always thought 50x zoom wasnt enough in my bag, this is going to solve those issues! I expect to see a new SX series camera or two announced for CES 2014 in Las Vegas next month.

    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

    Source: [EG]

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    Patent: Canon EF 300-600 f/5.6 w/1.4x TC

    Patent: Canon EF 300-600 f/5.6 w/1.4x TC

    Super telephoto patent
    A new Canon patent showing other lens formulas using a built-in 1.4x teleconverter. Two of the primary lenses are an EF 300-600 f/5.6L IS 1.4x and a 600 f/4L IS with a built in TC.

    The same patent also shows the EF 200-400 f/4L IS 1.4x TC. Perhaps Canon sees value in this setup for longer lenses? Here’s hoping so.

    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 °

    Source: [EG]

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    Patent: A Pellicle Mirror by Canon

    Patent: A Pellicle Mirror by Canon

    Canon coming full circle
    A patent revealing a pellicle mirror by Canon has made its way to public eyes. It seems everyone is researching the technology. Canon did this a long time ago in the Pellix, F1 High Speed, EOS RT and EOS 1N RS.

    Patent Publication No. 2013-218241

    • Publication date 2013.10.24
    • Filing date 2012.4.12

    Canon patent

    • Pellicle mirror
    • The transmitted light image sensor in, I lead the OVF the reflected light
    • Reflectance (transmittance) variable
    • (Low transmittance) high set the reflectance OVF when, at the time of imaging is set (high transmittance) low reflectance

    Source: [EG]

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    Patent: Canon EF 35mm f/1.4L II

    Patent: Canon EF 35mm f/1.4L II

    Canon EF 35 f/1.4L II
    A new patent for a Canon EF 35m f/1.4L II has shown it’s lovely head. We’ve seen patents previously and have heard various versions of the lens have been in testing for the past few years.

    Patent Publication No. 2013-195747

    • Publication date 2013.9.30
    • Filing date 2012.3.21

    Example 1

    • Focal length f = 14.17mm
    • Fno. 2.89
    • Half angle ω = 56.78 °
    • Image height 21.64mm
    • The overall length of the lens 133.50mm
    • BF 40.23mm
    • 14 pieces in 11 groups Lens Construction
    • 2 pieces of 2 aspherical surface
    • The effective diameter of the front lens 69.96mm

    Example 2

    • Focal length f = 24.50mm
    • Fno. 2.80
    • Half angle ω = 41.45 °
    • Image height 21.64mm
    • The overall length of the lens 92.07mm
    • BF 38.07mm
    • 8 group 9 lenses configuration
    • 2 pieces of 2 aspherical surface
    • The effective diameter of the front lens 34.58mm

    Example 3

    • Focal length f = 35.50mm
    • Fno. 1.45
    • Half angle ω = 31.36 °
    • Image height 21.64mm
    • The overall length of the lens 135.01mm
    • BF 38.56mm
    • 11 pieces Lens Construction 9 group
    • One piece of one aspherical surface
    • The effective diameter of the front lens 49.79mm

    Also included in this patent are formulas for a 14mm f/2.8 and a 24 f/2.8.

    Canon EF 35 f/1.4L $1479 at B&H Photo | Amazon

    Source: [EG]

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    Patent – EF-S 18-300 f/3.5-5.6

    A new superzoom
    As we mentioned a while back, Canon is working on an EF-S 18-300 f/3.5.5.6 IS STM to replace the no-so-good EF-S 18-200 IS.

    The 18-300 appears to be closer to happening as a patent has shown up showing the optical formula in practice.

    18300

    Canon EF-S 18-300 f/3.5-5.6

    Source: [EG]

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