Egami (translated) spotted a patent for a 100-400mm f/4.5-5.6 lens with diffractive optical elements. We saw other patents for a 100-400mm in the past. The patent refers also to a 70-300mm  f/4.5-5.6 lens.

Is this the patent for the replacement for the Canon EF 100-400 f/4.5-5.6L IS? Don’t think so, since the patent refers to a lens without IS. Just recently a rather weak rumor surfaced suggesting that the EF 100-400 f/4.5-5.6L IS replacement could be the next “L” lens Canon is going to announce, the latest rumor in a long series for this lens that hopefully will be seen one day.

• Patent Publication No. 2014-89385
  • Publication date 2014.5.15
  • Filing date 2012.10.31
• Example 1
  • Zoom ratio 3.78
  • Focal length f = 103.00-200.00-388.94mm
  • Fno. 4.63-5.24-5.83
  • Half angle ω = 11.86-6.17-3.18 °
  • Image height Y = 21.64mm
  • 228.82-273.58-303.10mm total length
  • BF 69.48-90.93-105.73mm
• Example 6
  • Zoom ratio 4.00
  • Focal length f = 72.50-135.00-289.99mm
  • Fno. 4.44-5.04-5.85
  • Half angle ω = 16.62-9.10-4.27 °
  • Image height Y = 21.64mm
  • 143.91-177.69-203.15mm total length
  • BF 39.10-39.10-39.10mm

[via Egami]

Egami (translated) spotted a Canon patent for a 24-70mm f/2.8 IS lens. This is the fourth time I am posting about such a patent (the other patents: 1 | 2 | 3).

• Patent Publication No. 2014-52413,2014-52445
  • Publication date 2014.3.20
  • Filing date 2012.9.5
• Example 1
  • Zoom ratio 2.75
  • Focal length f = 24.7-35.21-68mm
  • Fno. 2.9
  • Half angle ω = 41.21-31.57-17.65 °
  • Image height 21.64mm
  • 223.94-207.87-180.56mm overall length of the lens
  • BF 38.31mm

[via Egami]

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

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