Sigma 70mm f/2.8, 90mm f/2.8, and 100mm f/2.8 Patents Found

New Patents for Sigma 70mm f/2.8, 90mm f/2.8, and 100mm f/2.8 compact mirrorless lenses have been found. The Sigma 90mm has already been announced.

Sigma 90mm f/2.8 DG DN | Contemporary: B&H Photo / Amazon / Adorama

  • Applicant: Sigma Co., Ltd.
    Publication number: P2022061515
    Application number: P 2020169465
    Publication date: 2022-04-19 Title
    of invention: Imaging optical system
  • PROBLEM TO BE SOLVED: To provide a compact imaging optical system having a quiet and rapid focus in which various aberrations are well corrected in a lens for a digital camera or a video.
  • In recent years, there is an image pickup device in which the mirror portion is removed to shorten the distance between the image pickup optical system and the image pickup element.
  • Among them, a large-sized image pickup device and a miniaturized image pickup device are widely used. In contrast to the miniaturized image pickup apparatus, the imaging optical system is also required to be miniaturized in overall length and outer diameter.
  • According to the present invention, it is possible to obtain a compact imaging optical system having a quiet and rapid focus in which various aberrations are well corrected in a digital camera or a lens for video.

Example 4 (70mm F2.8)
Infinity Shortest shooting distance
Focal length 72.10 66.91
F number 2.90 2.90 Full angle of
view 2ω 31.67 31.76
Image height Y 21.63 21.63
Lens total length 70.44 70.44

Example 5 (100mm F2.8)
Infinity Shortest shooting distance
Focal length 102.00 93.47
F number 2.90 2.89
Full angle of view 2ω 22.67 22.83
Image height Y 21.63 21.63
Lens total length 87.72 87.72

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Sigma 24mm f/2 & 90mm f/2.8 DG DN Contemporary Lenses Officially Announced

Sigma officially announced the new and  for Sony E-mount mirrorless cameras. Both lenses are prices at $639. Now the new Sigma 24mm f/2 & 90mm f/2.8 DG DN Contemporary Lenses are available for pre-order at B&HAdorama.

Sigma 90mm f/2.8 DG DN | Contemporary: B&H Photo / Amazon / Adorama
Sigma 24mm f/2 DG DN | Contemporary: B&H Photo / Amazon / Adorama

Sigma 90mm f/2.8 DG DN Contemporary Lens Key Features

  • Sony E-mount/Leica L-mount
  • Aperture Range: f/2 to f/22
  • Five SLD Elements
  • One Aspherical Element
  • Minimum Focusing Distance: 1.6′
  • Rounded 9-Blade Diaphragm
  • All-Metal Barrel Construction
  • Weather-Sealed Construction

Sigma 24mm f/2 DG DN Contemporary Lens Key Features

  • Sony E-mount/Leica L-mount
  • Aperture Range: f/2 to f/22
  • Two SLD Elements
  • Two Aspherical Elements
  • FLD Element
  • Minimum Focus Distance: 9.65″
  • All-Metal Body
  • Durable, Weather-Sealed Construction

Continue reading “Sigma 24mm f/2 & 90mm f/2.8 DG DN Contemporary Lenses Officially Announced”

Sigma 90mm f/2.8 & 24mm f/2 DG DN Contemporary Lenses to be announced Soon

Sigma is planning to announce two new lenses for Sony E and Leica L mount full frame mirrorless cameras.

The next lenses from Sigma will be the Sigma 90mm f/2.8 DG DN Contemporary lens and the Sigma 24mm f/2 DG DN Contemporary lens.

Nokishita:

One of the lenses that Sigma will announce next will be “90mm F2.8 DG DN | Contemporary”. The other one is “24mm F2 DG DN | Contemporary”.

Continue reading “Sigma 90mm f/2.8 & 24mm f/2 DG DN Contemporary Lenses to be announced Soon”