Archive for the ‘Canon Patents’ Category

Patent: Canon EF 180mm f/3.5L IS

Patent: Canon EF 180mm f/3.5L IS

More Canon lens patents have shown up. This time we get some macro patents that also include hybrid IS. We’ve been told that the 180mm f/3.5L macro is on its way out, and this could be the direction Canon takes it.

A few other focal lengths also appear in the patent as well such as 200mm & 300mm versions with hybrid IS.

The information below is a Google translation.

  • Patent Publication No. 2014-41224
    • Publication date 2014.3.6
    • Filing date 2012.8.22
  • Example 1
    • Zoom ratio 1.37
    • Focal length f = 180.03-167.06-131.08mm
    • Fno (3.6-4.8-5.8 actual aperture). 3.6-3.3-2.59
    • Half angle ω = 6.85-7.38-9.37 °
    • Image height 21.64mm
    • The overall length of the lens 228.39mm
    • BF 68.14mm
  • Example 2
    • Zoom ratio 1.58
    • Focal length f = 198.49-164.7-125.48mm
    • Fno (3.6-4.8-5.8 actual aperture). 3.6-2.99-2.28
    • Half angle ω = 6.22-7.48-9.78 °
    • Image height 21.64mm
    • The overall length of the lens 231.65mm
    • BF 71.4mm
  • Example 3
    • Zoom ratio 1.92
    • Focal length f = 289.97-213.39-151.33mm
    • Fno (3.6-4.8-5.8 actual aperture). 3.6-2.65-2.21
    • Half angle ω = 4.27-5.79-8.14 °
    • Image height 21.64mm
    • The overall length of the lens 294.36mm
    • BF 68.05mm
  • Canon patents
    • Inner focus
    • (Part of the fourth lens group) antivibration
    • Supports Shifutobure (???)
    • Floating

Source: [EG]

cr

13 Comments

Patent: EF 16-35 f/4L, 17-40 f/4L and Others

Patent: EF 16-35 f/4L, 17-40 f/4L and Others

A slew of patents showing various wide angle optical formulas has appeared. All of the lenses appear to be for full frame and could be hints of replacements for the EF 17-40 f/4L as well as the EF 16-35 f/2.8L II.

  • Patent Publication No. 2014-41245
    • Publication date 2014.3.6
    • Filing date 2012.8.22
  • Example 1
    • Focal length f = 16.49-23.55-33.95mm
    • Fno. 4.10
    • Half angle ω = 52.68-42.57-32.51 °
    • 14 pieces of 10-group lens configuration
  • Example 2
    • Focal length f = 17.50-25.45-38.90mm
    • Fno. 4.10
    • Half angle ω = 51.03-40.36-29.08 °
    • 15 pieces of 11-group lens configuration
  • Example 4
    • Focal length f = 17.50-24.82-38.89mm
    • Fno. 2.88-3.25-4.10
    • Half angle ω = 51.02-41.08-29.09 °
    • 15 pieces of 11-group lens configuration
  • Example 5
    • Focal length f = 16.50-25.34-34.00mm
    • Fno. 2.91
    • Half angle ω = 52.66-40.49-32.47 °
    • 15 pieces of 11-group lens configuration
  • Canon patents
    • 4-group zoom of positive and negative positive negative
    • Inner focus

Source: [EG]

Canon EF 17-40 f/4L | Canon EF 16-35 f/2.8L II

cr

46 Comments

Patent: Canon EF 600 f/4L IS III & EF 600 f/4 DO IS

Patent: Canon EF 600 f/4L IS III & EF 600 f/4 DO IS

A new patent showing the 600mm f/4 optical formula. Is Canon already working on the replacements to the current super telephoto lenses? It’s quite possible! Although I suspect we’re talking 7-10 years from now. These sort of patents could also be for technology that will appear in  other lenses. Such as the upcoming replacement of the EF 800mm f/5.6L IS.

I do expect we’ll be seeing more DO lenses in the future. There seems to be an awful lot of patents for DO optical formulas. I suspect the cost of production is the hinderance to bringing these lenses to market at the present time. We already have $11,000 200-400 f/4 lenses and $18,000 800mm lenses. I suspect we’re at the ceiling of what people will pay for a lens…. or not. :)

Patent Publication No. 2014-26210

  • Publication date 2014.2.6
  • Filing date 2012.7.30

Example 1

  • Focal length f = 588mm
  • Fno. 4.12
  • Angle of view 2ω = 4.22 °
  • BF 56.0mm
  • Total lens length 374.7mm
  • Inner focus

Example 5

  • Focal length f = 588mm
  • Fno. 4.12
  • Angle of view 2ω = 4.22 °
  • BF 55.0mm
  • Total lens length 343.5mm
  • Inner focus
  • Diffraction optical element
  • Effect of the glass material
  • Fluorite (Fluorite)
  • In the long lens fluorite + total length, correction of chromatic aberration is easy
  • In short lens fluorite + total length, correction of chromatic aberration is difficult
  • Diffractive optical element (DOE)
  • Diffractive optical element can be corrected if the chromatic aberration
  • Flare caused by light diffraction

Source: [EG]

cr

12 Comments

Patent: Canon EF 24-85 f/3.5-5.6 IS

Patent: Canon EF 24-85 f/3.5-5.6 IS

A patent for an EF 24-85 f/3.5-5.6 IS has appeared. Along with this lens is a patent for the EF 24-70 f/4L IS. I do think Canon does need a new full frame non-L zoom lens to go into less expensive kits, or for an even less expensive full frame camera down the road.

Description and self-interpretation of the patent literature

  • Patent Publication No. 2014-16464,2014-16465
    • Publication date 2014.1.30
    • Filing date 2012.7.9
  • Example 3
    • Macro when in parentheses
    • Zoom ratio 2.84 (2.87)
    • Focal length f = 24.30-35.10-69.00mm (67.23-60.62)
    • Fno. 4.10 (5.28-5.56)
    • Half angle ω = 41.68-31.65-17.41 ° (17.84-19.64)
    • Image height Y = 21.64mm
    • 134.65-141.04-164.94mm overall length of the lens (162.09-152.75)
    • BF 39.15-46.02-59.68mm (64.95-67.73)
    • β = -0.17 (-0.7)
  • Example 4
    • Macro when in parentheses
    • Zoom ratio 3.42 (2.84)
    • Focal length f = 24.30-35.10-82.99mm (68.22-64.03)
    • Fno. 3.58-4.42-5.89 (5.92-5.87)
    • Half angle ω = 41.68-31.65-14.61 ° (17.60-18.67)
    • Image height Y = 21.64mm
    • 126.64-128.32-155.92mm overall length of the lens (149.57-148.58)
    • BF 39.39-49.31-64.14mm (65.59-65.96)
    • β = -0.17 (-0.6)
  • Canon patents
    • (4, etc. as in Example 3) seven-group zoom of positive and negative positive and negative positive positive and negative
    • (4, etc. the second group, as in Example 3) inner focus
    • implement the macro function by the first group fed out to the object side

Source: [EG]

cr

30 Comments

Patent: Canon EF 70-400 f/4.5-5.6L IS

Patent: Canon EF 70-400 f/4.5-5.6L IS

2014 will see the replacement of the Canon EF 100-400 f/4.5-5.6L IS, and we should see some new new patents showing new optical formulas for its replacement. Below is a patent for an EF 70-400 f/4.5-5.6L IS.

Description and self-interpretation of the patent literature

  • Patent Publication No. 2014-21256,2014-21257
    • Publication date 2014.2.3
    • Filing date 2012.7.18
  • Example 2
    • Zoom ratio 5.45
    • Focal length f = 71.33-144.71-388.95mm
    • Fno. 4.63-4.84-5.83
    • Half angle ω = 16.87-8.50-3.18 °
    • Image height Y = 21.64
    • 240.00-284.68-303.83mm overall length of the lens
    • BF 75.92-79.30-95.93mm
    • 6-group zoom of positive and negative positive and negative positive and negative
    • (Part of the fourth group) anti-vibration
    • Rear Focus (Group 6)

Source: [EG]

cr

53 Comments

Patent: Canon Macro Ring Flash

Patent: Canon Macro Ring Flash

A patent for what appears to be a new Canon ring flash has appeared.

We may see a new ring flash with the new macro lens in 2014. We’ve heard about the possibility of a zoom macro lens, but we can’t confirm the information at this time.

  • Patent Publication No. 2014-13350
    • Publication date 2014.1.23
    • Filing date 2012.7.5
  • Existing ring strobe
    • Xenon tube
    • Process to bend the arc shaped glass tube cylindrical difficult
  • Canon patents
    • There are two areas in light of the strobe
    • Light flux from the first region is subject to direct
    • Toward the object light beam from the second zone enters the prism, and then reflected inside
    • Provided with a step stepped on the reflecting surface, by changing the pitch of the step, it is possible to adjust the distance between the emission point

Source; [EG]

cr

7 Comments

Patent: Canon Curved Aperture Diaphragm

Patent: Canon Curved Aperture Diaphragm

Here’s another patent filing picked up by egami:

(translated)
Patent Publication No. 2014-13363,2014-13365

  • Publication date 2014.1.23
  • Filing date 2012.6.6


  • Canon patents

  • The iris of the dome-shaped

  • If I’m reading this correctly, if the aperture follows the curvature of the glass you end up by saving some space which can lead to more compact lenses, if not for the M line, than perhaps we’ll see some smaller EF-S lenses.

    egami via [CW]

    cr

    14 Comments

    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]

    cr

    75 Comments

    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.

    cr

    78 Comments

    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]

    cr

    16 Comments