Canon Patent To Make Display Of RAW Images Quicker

Canon Patent

Egami (translated) found a patent filed by Canon to accelerate the display of RAW files. The machine translated text says:

By using an extracted region of the focus area in focus, it is placed at the beginning of the file, the display of the file seems to be faster in practice

  • Patent Publication No. 2014-53701
    • Publication date 2014.3.20
    • Filing date 2012.9.6
  • Canon patents
    • From the in-focus position, to determine the area to be displayed in preference
    • To be recorded in the file rearranges the area
    • Face detection, or if you have focused on the focus area of ​​multiple consideration

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