Archive for the ‘Canon Patents’ Category

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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Patent: EF 100-400 f/4.5-5.6L IS

Patent: EF 100-400 f/4.5-5.6L IS

Another patent
This is probably the third separate patent I have seen for an EF 100-400 f/4.5-5.6L IS over the last 24 months. A zoom ring version does exist in the wild. We’re told the push/pull is finished and we’ll get a properly sealed 100-400. The cost will be north of $2500 USD and we could finally see it announced before the end of the year. Also appearing in the patent is a 70-300.

The breakdown below is Google translated

  • Patent Publication No. 2013-105053
    • Publication date 2013.5.30
    • Filing date 2011.11.15
  • Example 1
    • Zoom ratio 4.01
    • Focal length f = 72.48-135.49-290.86mm
    • Fno. 4.58-4.94-5.85
    • Half angle ω = 16.62-9.07-4.25 °
    • Image height Y = 21.64mm
    • 143.42-175.48-201.87mm overall length of the lens
    • BF 39.98mm
  • Example 3
    • Zoom ratio 3.75
    • Focal length f = 104.16-166.66-391.00mm
    • Fno. 4.60-5.20-5.80
    • Half angle ω = 11.73-7.40-3.17 °
    • Image height Y = 21.64mm
    • 221.48-252.31-300.68mm overall length of the lens
    • BF 70.65-87.69-113.37mm
  • Canon patent
    • I want to put in the first group the anomalous dispersion optical element
    • It is possible correction and lateral chromatic axial chromatic aberration, but spherical aberration of color and field curvature occurs
    • By optimizing the placement, the correction and field curvature, the spherical aberration of the color of g-line

Source: [EG]

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