Sigma 20mm f/2, 24mm f/2, and 28mm f/2 Patents Found

Sigma has filed new patents for three different lenses with f/2 aperture size. These lenses are Sigma 20mm f/2, 24mm f/2, and 28mm f/2 Lenses for Sony E-mount full frame mirrorless cameras. Continue reading “Sigma 20mm f/2, 24mm f/2, and 28mm f/2 Patents Found”

Sigma Patents for 24-70mm F2.8, 28-70mm F2.8 and 28-85mm F2.8

Sigma has filed new patents for 24-70mm f/2.8, 28-70mm f/2.8 and 28-85mm f/2.8 Lenses for Sony E-mount full frame mirrorless cameras.

[Publication number] P2022067732
[Publication date] May 9, 2022
[Patent application title] Large-diameter zoom lens

Example 1 (24-70mm F2.8)

Zoom ratio 2.75 Wide-
angle intermediate telephoto
focal length 24.72 39.76 67.98
F number 2.92 2.92 2.92
Full angle of view 2ω 85.24 56.96 34.33
Image height Y 21.63 21.63 21.63
Lens total length 135.00 145.60 171.09
Back focus 17.6206 17.6036 17.5749

Example 3 (28-70mm F2.8)

Zoom ratio 2.35 Wide-
angle intermediate telephoto
focal length 28.81 40.01 67.69
F number 2.92 2.92 2.92
Full angle of view 2ω 75.92 56.06 33.85
Image height Y 21.63 21.63 21.63
Lens total length 120.04 126.08 142.66
Back focus 19.6292 19.5884 19.6020

Example 4 (28-85mm F2.8)

Zoom ratio 2.90 Wide-
angle intermediate telephoto
focal length 28.79 49.98 83.51
F number 2.92 2.92 2.92
Full angle of view 2ω 75.61 45.42 27.77
Image height Y 21.63 21.63 21.63
Lens total length 135.02 146.97 164.94
Back focus 17.6146 17.5433 17.5817

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

via digicame-info

Sigma Firmware Updates: 16mm/30mm/56mm f/1.4, 35mm f/2 DG DN Contemporary Lenses

Sigma has released the new firmware updates for 16mm f/1.4, 30mm f/1.4, 56mm f/1.4 & 35mm f/2 DG DN Contemporary Lenses for Sony E mount. You can follow the links below to download the firmware updates.

Sigma 35mm F2 DG DN | Contemporary
Adorama
Ver.02 2022.04.07
It reduces the AF drive sound.

Download Here

Sigma 16mm F1.4 DC DN | Contemporary
Adorama
Ver.03 2022.04.07

The specification has been changed so that the focus position of the lens when the ON/OFF (power) switch is turned “ON”, or when the camera is restored from power save, is set to the same shooting distance when the ON/OFF (power) switch was turned “OFF” or when power save was activated.

Download Here

Sigma 30mm F1.4 DC DN | Contemporary
Adorama
Ver.04 2022.04.07

The specification has been changed so that the focus position of the lens when the ON/OFF (power) switch is turned “ON”, or when the camera is restored from power save, is set to the same shooting distance when the ON/OFF (power) switch was turned “OFF” or when power save was activated.

Download Here

Sigma 56mm F1.4 DC DN | Contemporary
Adorama
Ver.02 2022.04.07
・The focus position of the lens when the ON/OFF (power) switch is turned “ON” or when the camera is restored from power saving has been changed to the specification that the focus position is set to the shooting distance right before the ON/OFF (power) switch is turned “OFF” or power saving is activated.
・Improved feeling of the MF operation of the lens.

Download Here

Best 24mm Lens for Sony (Samyang, Tamron, Sigma, Viltrox VS. Sony)

Lensvid published a comprehensive lens review roundup, looking at five different full-frame E-mount lenses from Sony, Samyang, Tamron, Sigma, and Viltrox. In order to find out which is the best 24mm lens for full-frame e-mount cameras, all these lenses are at the 24mm focal length

The lenses that we shall be reviewing today are the following:

Sigma 28-70mm f/2.0 Full Frame Lens Patent Found

New Sigma patent discloses the 28-70mm f/2.0 specs for full frame mirrorless.

Sigma 28-70mm f/2.0 full frame  lens patent

  • Focal length: 28.90-67.75
  • F value: 2.07
  • Angle of view: 76.73-33.8
  • Image height: 21.63
  • Overall length: 147.85-11.89

Asobinet found several new Sigma patents online. Here are the other Sigma lenses:

  • 28-70mm f/2.0 for full frame mirrorless sytems
  • 14-30mm f/4.0 for full frame mirrorless sytems
  • 20mm f/1.4 for APS-C mirrorless sytems
  • 23mm f/1.4 for APS-C mirrorless sytems
  • 28mm f/1.4 for APS-C mirrorless sytems
  • 33mm f/1.4 for APS-C mirrorless sytems

The fast aperture standard zoom lens will compete against the  the current Tamron 28-75mm F2.8 Di III RXD lens and Sigma 28-70mm F2.8 DG DN Contemporary lens.

Sigma announces 20mm F2 DG DN lens for E-mount

Sigma has announced the 20mm f/2 DG DN Contemporary lens. Designed for  full-frame Sony E mount, you can use this premium lens on mirrorless cameras such as the Sony A7 IVSony A7R IV

The US price is $699 at B&HPhoto and Adorama.

Sigma 20mm F2 DG DN lens for E-mount Video reviews:

Press release: Continue reading “Sigma announces 20mm F2 DG DN lens for E-mount”

Sigma 20mm f/2 DG DN Contemporary Lens Coming Soon

Sigma 20mm f/2 DG DN Contemporary Lens Coming on February 9th. Sigma will hold a new product announcement on February 9th at 21:00 JST, and it is highly likely that this new product will be the Sigma 20mm f/2 DG DN Contemporary Lens.

The Sigma 20mm f/2 DG DN Contemporary Lens will be designed for Sony full frame E mount cameras. Continue reading “Sigma 20mm f/2 DG DN Contemporary Lens Coming Soon”

Coming Soon : Sigma 20mm f/2.0 DG DN E-mount Lens

Sigma will soon announce the new 20mm f/2.0 DG DN E-mount lens. Following the three existing DG DN primes, Sigma will very soon launch their new 20mm f/2.0 DG DN E-mount lens.

Sigma 20mm f/2.0 DG DN E-mount Lens Specs

  • 13 lenses in 11 groups
  • minimum shooting distance 22cm
  • maximum shooting magnification 1: 6.7
  • filter diameter 62mm
  • size φ70 × 72.4mm
  • weight 370g
  • Suggested retail price the same as the 65mm F2

Continue reading “Coming Soon : Sigma 20mm f/2.0 DG DN E-mount Lens”

Sigma 18-50mm f/2.8 DC DN Contemporary Lens Officially Announced

Available in Sony E and Leica L mounts, the new Sigma 18-50mm f/2.8 DC DN Contemporary Lens is now officially announced. The US price of the lens is $549 and pre-orders are open at B&HAdorama. Shipping is scheduled to start in late October 2021.

Pre-order links:

Sigma 18-50mm f/2.8 DC DN Contemporary Lens for Sony E: $549 at B&HAdorama.

Sigma 18-50mm f/2.8 DC DN Contemporary Lens for Leica L: $549 at B&HAdorama.

Sigma 18-50mm F2.8 DC DN | Contemporary Features:

  • Large F/2.8 aperture and superb image quality
  • Exceptionally compact and lightweight body ideal for mirrorless cameras
  • Supports a variety of shooting situations
  • Lens construction: 13 elements in 10 groups, with 1 SLD element and three aspherical elements
  • 7-blade rounded diaphragm
  • Super Multi-Layer Coating
  • Petal-type lens hood
  • Mount with dust- and splash-resistant structure
  • Brass bayonet mount
  • Angle of view (APS-C): 76.5º (W) – 31.7º (T)
  • Number of diaphragm blades: 7 (rounded diaphragm)
  • Minimum aperture: F22
  • Minimum focusing distance: 12.1cm (W) – 30cm (T)
  • Maximum magnification ratio: 1:2.8 (W) – 1:5 (T)
  • Filter size: 55mm
  • Dimensions (Maximum Diameter x Length): 65.4mm×74.5mm
  • Weight: 290g

Continue reading “Sigma 18-50mm f/2.8 DC DN Contemporary Lens Officially Announced”