Archive for the ‘Canon Patents’ Category

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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Patents: New 50mm, 85mm & 135mm Lenses

Patents: New 50mm, 85mm & 135mm Lenses

New fast primes
The often talked about 50 f/1.4 and 135 f/2 have appeared in a new patent this week. We’ve heard that a replacement to the 50 f/1.4 would come first. A new 135 f/2L is a desired lens if they put IS into the upgrade. We’ve also heard a new 85 f/1.2L with reduced weight and approved AF performance was also on the horizon.

  • Patent Publication No. 2013-114133 (Google Translated)
    • Publication date 2013.6.10
    • Filing date 2011.11.30
Focal length Fno. The overall length of the lens BF Lens constitution
One 85.00 1.24 122.56 38.35 10 pieces of six groups
Two 83.30 1.80 116.11 39.11 10 sheets in 7 groups
Three 132.30 2.06 162.67 43.23 10 sheets in 7 groups
Four 51.70 1.41 87.84 38.94 7 group nine
  • Factors that chromatic aberration of magnification chromatic aberration or axial chromatic aberration occurs
    • Reducing the total length
    • Focal length for a long time
  • Glass material Abbe number 70-90, of 1.4-1.5 refractive index
    • Possible correction of axial chromatic aberration
    • Must increase a curvature, spherical aberration and curvature of field is generated
  • Canon patent
    • I use a glass material having an anomalous partial dispersion of the predetermined
    • Consisting of organic and inorganic compound

Source: [EG]

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Patent – New Superzooms

Replacement to the EF-S 18-200 IS?
A patent has come about showing two lenses, one for APS-C at 18-200 and the other for full frame with a focal range of 28-200.

We’ve been told in the past that the 18-200 would be getting replaced, and we have heard about an EF-S 18-300 in development. It would also be a good idea to release an inexpensive superzoom for a full frame camera as well. The 6D would welcome such a lens.

1020028200

 

Source: [EG]

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Patent: Canon Foveon Sensor

Patent: Canon Foveon Sensor

Canon still working on Foveon Technology
Canon has been working on 3 layer Foveon sensor technology for a while now, it still hasn’t appeared in a camera and we haven’t heard anything to say it will. However, the fact they continue to spend resources on it, tells us there is definitely a good application for the technology.

Patent Publication No. 2013-93553 (Google Translated)

  • Publication date 2013.5.16
  • Filing date 2011.10.4

Imaging element of three-layer structure

  • Photodiode deep layer (hereinafter, PD) in the charge is diffused into the substrate
  • Thus sensitivity is poor red

Canon patent

  • I as a photonic crystal of irregular shape, the boundary surface of the PD of red or green,
  • In the periodic structure of uneven spacing, less than twice the 1/4 times or more the wavelength of light, or I shall be two times or less 1/2 times or more
  • Irregular shape has the properties to be spatially-localized or resonant light
  • The incident light is diffracted, it combines with the light of the boundary plane, the resonant
  • Prolonged exists than normal, the light becomes easy to be absorbed by the PD Thus

Source: [EG]

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Patent: More DO Supertelephoto Lenses

DO appears to still be alive
More patents for large Canon DO lenses. The one of note is the 500 f/5.6, a lens that would be a very solid follow-up to the EF 400 f/4 DO IS.

We’ve seen a lot of these patents in the past, and none of them have ever come to market. It is good to see R&D is still going into DO technology, as I really enjoy the 400 DO.

50056dopatent

Source: [EG] via [NL]

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Patent – Tilt Shift Lens Related

Patent – Tilt Shift Lens Related

A new tilt-shift related patent from Canon
A patent to help usability by changing the grind lines on the EVF or LCD when tilting, shifting and rotating. This is definitely something I could see being useful in a tilt-shift macro.

Patent Publication No. 2013-81129 (Google Translation)

  • Publication date 2013.5.2
  • Filing date 2011.10.5

Shooting assist functions suitable for tilt lens

  • Rotate display grid lines
  • The angle information of the tilt lens to determine the angle of the grid lines
  • To align in the direction of change of focus, the angle of the grating lines, easy to compose the picture

Source: [NL] via [EG]

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Patent: EF 400 f/4 DO IS II

Patent: EF 400 f/4 DO IS II

Another DO patent
We haven’t seen a new DO lens in a long time, but the patents haven’t stopped. It looks like Canon is continuing the R&D, I’d love to see it go somewhere.

Interpretation and self-description of the patent literature

  • Patent Publication No. 2013-64858
  • 2013.4.11 Release Date
  • Filing date 2011.9.16

Example 1

  • Focal length f = 392.12mm
  • Fno. 4.12
  • Half angle of ω = 3.16 °
  • Image height Y = 21.64mm
  • 262.14mm length lens
  • BF 69.97mm
  • Two fluorite
  • Materials and anomalous partial dispersion DOE to use, reduce the chromatic aberration
  • Refractive power of the diffractive surface
  • Strong, but can reduce the chromatic aberration of the element itself, flare increases
  • The weaker, other optical element DOE play a role
  • Refractive optical unit
  • DOE anomalous partial dispersion and bonding materials
  • DOE aspherical surface on the opposite side of the
  • Vibration control
  • Inner Focus

Source: [EG] | Canon EF 400 f/4 DO IS

Patent: Canon EF 14 f/2.8 with Fluorite

Patent: Canon EF 14 f/2.8 with Fluorite

Patent for wide angle fluorite concepts
Canon has filed patent for a wide angle fluorite concept. Such a patent could be part of a new ultra-wide zoom lens, perhaps a 14-24 or a replacement to the 16-35. Egami also thinks it’s possible this patent could be for the EF-M mount. It’s an interesting read, even when Google translated. Read the full patent here.

  • Patent Publication No. 2013-37339
    • 2013.2.21 Release Date
    • Filing date 2011.7.12
  • Example 1
    • Zoom ratio 1.00
    • Focal length f = 1.00mm
    • Fno. 2.90
    • Half angle of view ω = 56.66 °
    • Image height Y = 1.52mm
    • 9.51mm length lens
    • BF 2.82mm
    • 6 aspherical surfaces, the first surface 25
    • Punctually
  • Example 3
    • Zoom ratio 2.06
    • 2.06mm – f = 1.00 focal length
    • Fno 2.79 -. 4.00
    • Half angle of view ω = 51.27 – 32.82 °
    • 1.33mm – Y = 1.25 image height
    • 8.55mm – 8.79 length lens
    • BF 2.41 – 3.46mm
    • Aspheric first surface, the fifth surface, the first surface 26
    • Positive and negative positive negative
  • Example 6
    • Zoom ratio 1.00
    • Focal length f = 1.00mm
    • Fno. 2.90
    • Half angle of view ω = 87.35 °
    • Image height Y = 21.60mm
    • 9.51mm length lens
    • BF 2.82mm
    • 6 aspherical surfaces, the first surface 25
    • Punctually

Source: [EG]

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Patent: Noise & Aliasing Reduction for Small Pixels

Patent: Noise & Aliasing Reduction for Small Pixels

A patent for APS-C?
Canon has filed a patent to reduce the noise and aliasing in small pixels.

This sort of patent could benefit higher megapixel APS-C cameras, like the EOS 7D Mark II.

Source: [EG]

EOS 7D Body at B&H Photo for $1199

 

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Patent: Integrated Lens for an APS-C Compact Camera?

Patent: Integrated Lens for an APS-C Compact Camera?

Camera Lens 18-70 f/2.8-6
A patent has shown up for a lens that is an 18-70 f/2.8-6. It looks like the lens could possibly be for a fixed lens APS-C camera. The PowerShot G1X, while a cool enough camera, didn’t catch on. Canon may not be done exploring a large sensor fixed lens camera.

Personally, I’d be more into a Sony RX1 style camera for a few dollars less.

As a side note, the G1X was announced last year for CES, and that’s coming up in January.

Read the full patent

 

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