Archive for the ‘Canon Patents’ Category

Patent: Canon EF-S 11-24mm f/3.5-4.5

Patent: Canon EF-S 11-24mm f/3.5-4.5

Is Canon working on a replacement to the very good EF-S 10-22mm f/3.5-4.5? By the looks of this patent they are. I’d expect any replacement to have STM and maybe a bit better build quality, though the current one is about as reliable as they come.

Example 3 (Google Translated)

  • Zoom ratio 2.07
  • Focal length 11.61-15.50-24.07mm
  • Fno. 3.63-3.96-4.69
  • Half angle ω = 49.64-41.38-29.58 °
  • Image height Y = 13.66mm
  • Overall length of the lens 133.0-129.1-133.3mm
  • BF 3.26mm
  • Negative positive and negative positive 4-group zoom
  • Inner focus (Lf part of the first group)

Source: [EG]

cr

46 Comments

Patent: Canon EF 35mm f/1.4L II

Patent: Canon EF 35mm f/1.4L II

A new patent for an EF 35mm f/1.4L II has appeared. We haven’t seen a new patent for this optical formula in quite some time.  I recently received a claim that we’ll see such a lens in Q1 of 2015, but I haven’t been able to confirm that information.

Patent Publication No. 2014-202952

  • Published 2014.10.27
  • Filing date 2013.4.5

Example 1

  • Focal length f = 34.20mm
  • Fno. 1.45
  • Half angle ω = 32.32 °
  • Image height Y = 21.64mm
  • Lens length 129.16mm
  • BF 39.35mm

Source: [EG]

cr

41 Comments

Patent: 10-22mm f/3.5-4.5 With a Liquid Element

A patent showing a 10-22 f/3.5-4.5 optical formula with a liquid element has shown up. I think it’s safe to say that this isn’t going to end up as a consumer product any time soon, but it’s still pretty interesting.

liquidelementpatent

  • Patent Publication No. 2014-145883 (Google Translated)
    • Published Date 2014.8.14
    • Filing date 2013.1.29
  • Example 4
    • Zoom ratio 2.07
    • Focal length f = 10.30-13.12-21.35mm
    • Fno. 3.23-3.62-4.63
    • Half angle ω = 52.86-46.03-32.50 °
    • Image height 13.60mm
    • The overall length of the lens 135.13-133.91-135.09mm
    • BF 0.15mm
  • Canon patents
    • And by varying the shape of the boundary surface, thereby changing the refractive power
    • Zooming, and has a refractive power element is positive, the element is negative
    • And reduce the variation of the curvature

Source: [EG] via [NL]

cr

13 Comments

Patent: Canon EF 2.0X TC With Diffractive Optics Element

dotc

A patent showing a 2x teleconverter with a diffractive optic element (DO) has surfaced. The 2.0x teleconverter could use a little length reduction, though I’m not sure if DO would reduce the size of the current TC all that much.

Patent Publication No. 2014-145870 (Google Translated)

  • Published Date 2014.8.14
  • Filing date 2013.1.29

+Continue Reading

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Patent: Canon 2mm f/1.4 Lens for Small Sensors

A patent for a 2mm f/1.4 lens from Canon has appeared. This type of lens would be for a small sensor device such as a compact video camera or action camera.

canon2mmpatent

Patent Publication No. 2014-197128 (Google Translated)

  • Published  Date 2014.10.16
  • Filing date 2013.3.29

Example

  • Focal length f = 2.03mm
  • Fno. 1.44mm
  • Half angle ω = 59.18 °
  • Image height 3.00mm
  • The overall length of the lens 32.17mm
  • BF 0.51mm
  • Canon patents
  • Focus position of the periphery of the screen is shifted If you install the dome cover
  • And suppress the deviation of the focus by changing the air space of the lens in accordance with the presence or absence of the dome cover

Source: [EG]

cr

7 Comments