Canon Patent For New 85mm, 100mm, and 50mm Lenses

Canon PatentCanon Patent

Egami (translated) spotted a new patent filed by Canon.

The patent refers to 85mm f/1.8, 85mm f/1.2, 50mm f/1.4, and 100mm f/2 lenses. The next reiteration of some of Canon’s lenses?

Patent Publication No. 2014-52412

  • Publication date 2014.3.20
  • Filing date 2012.9.5

Example embodiment
Example     Focal length     Fno.     Length     BF
One             85.00     1.24     125.55     38.98
Two            85.00     1.80     113.57     39.50
Three         51.70     1.41     88.04     39.00
Four         100.00     2.00     120.00     39.60
Image height = 21.64mm

 

Sigma Patent For 28-85mm OS Lens For Mirrorless Cameras

Sigma Patent

Will there soon be another lens for the EOS M system? The patent was spotted by Egami (translated).

At least Sigma is working on an image-stabilized 28-85mm f/3.5-5.6 lens for APS-C mirrorless systems. Exciting news, though I am a bit puzzled because of the 28mm – rather unusual for a crop sensor camera.

  • Patent Publication No. 2014-44246
    • Publication date 2014.3.13
    • Filing date 2012.8.24
  • Example 1
    • Zoom ratio 2.84
    • Focal length f = 29.01-50.00-82.48mm
    • Fno. 3.63-4.59-5.78
    • Angle of view 2ω = 53.08-31.21-19.16 °
    • Image height Y = 14.20mm
    • 92.04-103.13-116.62mm overall length of the lens
    • Inner Focus (Group 4)
    • Anti-vibration (group 2)

Sigma Patent

Canon Patent For New Macro Lenses With Hybrid IS (180mm, 200mm, 300mm)

Canon Patent
180mm f/3.5 Macro IS
Canon Patent
200mm f/3.5 Macro IS

 

Canon Patent
300mm f/3.5 Macro IS

Egami (translated) spotted another patent filed by Canon, this time for new macro lenses with hybrid image stabilization: 180mm f/3.5 IS, 200mm f/3.5 IS, and 300mm f/3.5 IS.

  • 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

 

Canon Patent For New 16-35mm and 17-40mm Lenses (?)

Canon Patent Canon Patent

Egami (translated) spotted some interesting patents filed by Canon.

The patent refers to new 17-40mm and 16-35mm lenses, as you can see with apertures between f/2.8 and f/4. Are these patents for the replacements of the EF 16-35mm f/2.8L II USM and the highly popular Canon EF 17-40mm f/4L USM lenses? These two lenses were measured by DxOMark a few weeks ago.

Canon Patent

  • 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

 

Canon Patent For 600mm f/4 Lens

Canon Patent

Egami (translated) spotted a patent filed by Canon for a new 600mm f/4 lens. Egami suggests the lens will be ready for Tokyo Olympic Games in 2020 and the Rio de Janeiro Olympic Games in 2016.

  • 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

Canon Patent for 24-85mm and 24-70mm Lenses (with Macro)

pat

Lots of Canon patents surfaced in the last weeks. Here is another one spotted by Egami (translated). If I got the (machine-) translated text right, both lenses should also feature macro capabilities.

  • 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