Canon patent for EF 15-105mm f/2.8-5.6 lens

2015_118141_fig03

Canon filed a patent for an EF 15-105mm f/2.8-5.6 lens.

  • Patent Publication No. 2015-118141
    • Published 2015.6.25
    • Filing date 2013.12.17
  • Example
    embodiment
    Example Zoom ratio Focal length Fno. Half angle Image height Overall length of the lens BF
    1 4.12 24.75 52.09 101.92 3.60 4.81 5.83 41.16 22.56 11.98 21.64 146.25 166.83 195.25 38.99 58.34 73.70
    2 6.81 15.40 22.95 104.92 2.88 3.39 5.60 41.57 30.76 7.42 13.66 149.46 154.42 222.88 38.13 46.49 77.97
  • Canon patents
    • Positive and negative positive and negative positive and negative positive 7-group zoom
    • Inner focus (fourth group)
[via Egami]

Canon Patent for EF/EF-S adapter for full-frame mirrorless camera

cp

This is a very interesting patent, a patent that hopefully points to something that will hit the market.

The patent refers to an adapter for a full-frame mirrorless camera. The adapter has a switch to change between EF and EF-S lenses.

  • Patent Publication No. 2015-118208
    • Published 2015.6.25
    • Filing date 2013.12.18
  • Canon patents
    • Flange back is shorter body
    • Flange back is long, a lens having the same image circle as the image pickup device body
    • Flange back is long, a lens with a smaller image circle than the image pickup device body
    • Mount adapter to change the diameter of the flare cut stop, depending on the image circle of mounting the lens

May a full-frame mirrorless camera by Canon finally be on its way?

[via Egami]

Canon EF-S 20mm f/2.8 STM lens patent

2015_111192_fig05

Canon filed a patent for an EF-S 20mm f/2.8 STM lens. Will this be the next pancake lens for APS-C DSLRs?

  • Patent Publication No. 2015-111192
    • Published 2015.6.18
    • Filing date 2013.12.6
  • Example 3
    • Focal length 20.65mm
    • Fno. 2.88
    • Half angle of view ω = 33.48 °
    • Image height Y = 13.66mm
    • Overall length of the lens 64.00mm
    • BF 35.30mm
  • Canon patents
    • Negative ShiboTadashi
    • The pay-out the entire
[via Egami]

Canon working on a drone/action camera? (patent)

canon patent

Canon filed a patent for what appears to be either a drone or an action camera to mount on a drone, or for a drone with integrated camera (any help appreciated).

  • Patent Publication No. 2015-106840
    • Published 2015.6.8
    • Filing date 2013.11.29
  • Canon patents
    • And control the angle of the vertical and horizontal direction of the camera
    • The analysis of the position coordinates from the GPS satellite
    • The stored the coordinates of the object
    • Altimeter
[via Egami]

Canon patent to increase dynamic range with use of Neutral Density filter (using Dual Pixel AF)

p

Canon filed  patent to increase dynamic range by using a Neutral Density (ND) filter on half of the measured field. This is a pretty complex one and I am not 100% sure I got it right (any help welcome).

The described system works by getting different degrees of light intensity from the Dual Pixel auto-focus (DPAF) points (i.e. split pixels) on the sensor. The patent says the ND filter is placed on 50% of the measured field: different amounts of light hit the split AF pixels needed for DPAF (this means both of the split pixels are used to measure the DR). The result is an output that’s able to render an increased dynamic range to the sensor, and a easier to measure differential signal from the DPAF points. It is not as easy as I am trying to put it :-) To learn more about Canon’s Dual Pixel Auto-Focus technology have a look here.

  • Patent Publication No. 2015-87401
    • Published 2015.5.7
    • Filing date 2013.10.28
  • Canon patents
    • Dual Pixel AF
    • And set up a half-ND filter at the pupil position of the lens
    • Half ND filter can be switched
[via Egami]