Sigma Patent: 70-200mm f/4 DG DN OS Lens For FF Mirrorless Cameras

Sigma Patent

A Sigma patent application for a 70-200mm lens for full frame mirrorless cameras. Let’s hope for the EOS R system too.

Sigma patent application 2020-86133A discusses the optical formula for a 70-200mm DG DN OS lens , “OS” being Sigma’s denomination for in lens image stabilization.

  • Zoom ratio: 2.68
  • Focal length: 72.50 118.13 193.95 mm
  • F number: 4.00 3.99 4.00
  • Angle of view: 33.22 20.36 12.38
  • Image height: 21.63 21.63 21.63 mm
  • Lens length: 200.60 200.60 200.60 mm

Canon patent applications are listed here.

Sigma Patent For 12mm f/2.8 Lens For Full Frame Cameras

Sigma Patent

Is this the next super cool Sigma lens?

Hi Lows Note spotted a patent application (2018-189733) by Sigma for a 12mm f/2.8 lens for full frame cameras.

  • Focal length: 12.42 mm
  • F number: 2.93
  • Angle of view: 120.49
  • Image height: 21.63 mm
  • Lens length: 169.4 mm

Apparently the lens has some sort of distortion correction built in:

The present invention relates to the wide angle lens system in which the back focus used for a digital camera, a video camera, a film-based camera, etc. corrected several aberrations, such as a distortion aberration […]

Someone?

Sigma patent: 14mm f/3.5 lens for APS-C mirrorless cameras

14mm f/3.5

It’s getting more and more interesting for mirrorless camera owners. Sigma filed a new patent for a 14mm f/3.5 lens for mirrorless cameras with APS-C sensors. According to the patent description this would be a zero-distortion lens, something we recently saw on a new Laowa lens.

  • Patent Publication No. 2016-139087
    • Published 2016.8.4
    • Filing date 2015.1.29
  • Example 1
    • INF 200mm
    • Focal length 13.98 13.28
    • F-number 3.53 3.54
    • Full angle of view 2ω 90.74 92.90
    • The image height Y 14.20 14.20
    • Overall length of the lens 89.25 89.25
    • BF 17.5750
    • Lens configuration 8 groups 10 sheets
    • 2 aspherical three sides
    • ED 1 ( sigma in ELD)
    • Fluorite 4 ( sigma in FLD)
  • Example 2
    • INF 200mm
    • Focal length 13.97 13.28
    • F-number 4.13 4.13
    • Full angle of view 2ω 90.90 92.68
    • The image height Y 14.20 14.20
    • Overall length of the lens 82.60 82.60
    • BF 17.6874
    • Lens configuration 8 groups 10 sheets
    • 2 aspherical three sides
    • ED 1 ( sigma in ELD)
    • Fluorite 4 ( sigma in FLD)
  • Sigma patents
    • FumakeTadashi
    • Inner focus (the second group)

[via Egami]

 

Sigma patent for 24-70mm f/2.8 DG OS HSM Art lens

sigma patent

I usually do not feature patents by other companies but this time I think it is worth to make an exception. A patent filed by Sigma (No. 2016-38502) was spotted and it points to a lens a lot of photographers are hoping Sigma will bring to market soon, it’s a 24-70mm f/2.8 DG OS HSM Art lens.

Such a lens, given it comes with Canon mount (which is very likely) would compete with Canon’s EF 24-70mm f/2.8L II USM. If it comes with the outstanding quality and performance we have seen on other recent Sigma lenses, and if it has a competitive price, then it may well cause some distress at Canon.

[via Egami]