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


Example 1

  • Focal length: 24.00
  • F value: 2.07
  • Angle of view: 90.08
  • Image height: 21.63
  • Overall length: 90.00


Example 2

  • Focal length: 28.00
  • F value: 2.07
  • Angle of view: 79.98
  • Image height: 21.63
  • Overall length: 90.00


Example 3

  • Focal length: 20.00
  • F value: 2.06
  • Half angle of view: 100.46
  • Image height: 21.63
  • Overall length: 90.00

Overview

  • [Public number] P2022073433
  • INDUSTRIAL APPLICABILITY INDUSTRIAL APPLICABILITY
  • [Filing date] 2020-11-02
  • [Applicant]
    [Identification number] 000131326
    [Name or name] Sigma Co. , Ltd.
  • [0001]
    The present invention is most suitable for digital cameras, silver salt cameras, video cameras, etc., and is particularly suitable for a mirrorless camera having an angle of view of about 80 ° to 100 °, a small size, and a short back focus. Regarding the optical system.
  • [0002]
    In recent years, the market share of mirrorless cameras has been increasing in interchangeable lens digital cameras. Mirrorless cameras tend to be smaller than single-lens reflex cameras by using a short flange back. There is a demand for miniaturization of interchangeable lenses to match the miniaturization of camera bodies. Since the mirrorless camera has a short flange back, a product with a shorter optical length and a shorter back focus than a lens for a single-lens reflex camera is required in order to reduce the size.
  • [0003]
    Further, as mirrorless cameras have become widespread, the moving image function has become more important. It is necessary to keep the drive sound associated with autofocus small so that sound does not enter the image when shooting a movie, and considering the need for miniaturization of the lens body, the motor can not be made large, so the parts that drive during focus are lightweight. Is required.
  • [0004]
    However, while miniaturization is desired, it is also desired to increase the diameter and performance of the interchangeable lens in order to increase the number of pixels of the output device and differentiate it from the smartphone camera.

via asobinet

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Tamron 28-75mm f/2.8 Di III VXD G2 vs Tamron 28-75mm f/2.8 Di III RXD Compared

The Tamron 28-75mm f/2.8 Di III VXD G2 has some slight advantages over the Tamron 28-75mm f/2.8 Di III RXD, which you can see above or you can check out the key differences from this comparison below:

  • Minimal changes
  • The build is largely the same with the new lens weighing 10g less
  • New lens has customizable buttons and a USB port to connect the lens to your computer to customize a lot of things on the lens
  • New lens is a little more expensive
  • Both are a great value for the money and the build quality is great for both
  • The new lens has slightly better handling thanks to the updates
  • AF is about the same in good lighting
  • AF in low light is a little worse on the new lens
  • Both lenses are sharp and in focus, while tracking focus
  • Both lenses lock onto subjects well for video at slow and fast paces
  • Both lenses are very quite
  • The newer lens is by far the better lens for manual focus because you can customize it via software
  • The older lens has a nonlinear manual focus and is difficult
  • The new lens has less focus breathing
  • Circular Bokeh right up to the edge of the frame
  • Old lens has a little more onion ring Bokeh
  • New lens has a little softer Bokeh that is more pleasing
  • Both lenses have similar flaring/ghosting and performance is good
  • Both lenses have green fringing on the top and amber fringing below the point of sharp focus
  • You really can’t go wrong with either lens capturing real-life images
  • Both lenses are similarly sharp wide open at 28mm but the G2 performs better in the corners
  • At 75mm the G2 lens is sharper in the center and corners
  • The new G2 is the better performer, but there might be some good deals in the G1

Tamron 28-75mm f/2.8 Di III VXD G2:
B&H Photo / Amazon / Adorama

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Sigma 55mm f/1.4, 65mm f/1.4, and 70mm f/1.4 Patents Found


Example 1

  • Focal length: 54.42
  • F value: 1.46
  • Angle of view: 43.62
  • Image height: 21.63
  • Overall length: 167.72


Example 2

  • Focal length: 62.87
  • F value: 1.46
  • Angle of view: 38.04
  • Image height: 21.63
  • Overall length: 167.71


Example 3

  • Focal length: 69.51
  • F value: 1.76
  • Half angle of view: 34.46
  • Image height: 21.63
  • Overall length: 167.64


Example 4

  • Focal length: 63.94
  • F value: 1.46
  • Half angle of view: 37.41
  • Image height: 21.63
  • Overall length: 167.68

Overview

  • [Public number] P2022071325
  • [Release date] 2022-05-16
  • (22) [Filing date] 2020-10-28
  • [Title of the invention] Single focus lens
  • [Applicant]
    [Identification number] 000131326
    [Name or name] Sigma Co. , Ltd.
  • PROBLEM TO BE SOLVED: To provide a single focus lens in which various aberrations capable of quick autofocus with a large aperture ratio of about F1.4 are satisfactorily corrected.
  • BACKGROUND
    ART [0002] In
    a single-focus photography optical system used in an optical device such as a digital camera, a large-diameter ratio is required to support high-speed photography and expression that makes use of blur. .. Further, as the pixel density of the image pickup device is increased, it is required to further correct various aberrations and achieve high performance. Conventionally, in the imaging optical system for a single-lens reflex camera, the retrofocus type is often adopted because it is necessary to secure the back focus as the movable range of the mirror. A photographic lens that uses a retrofocus type to achieve long back focus, a large aperture ratio, and high performance is known.
  • [0004]
    Patent Document 1 discloses an example having a lens configuration having a role of a wide converter composed of a concave lens and a convex lens component on the object side of a double Gauss type lens configuration that has been widely used for a lens having a standard angle of view. There is. This optical system has a large aperture with an FNO of about 1.4. However, mainly the aberration correction in the sagittal direction is insufficient, and the image spreads widely in the high part of the peripheral image. Patent Document 2 discloses an optical system having a lens configuration having a role of a wide converter on the object side of a double Gauss type as in Patent Document 1. Although this optical system has a large number of lenses constituting a lens group having a role of a wide converter and enables close-up photography as compared with Patent Document 1, aberration correction in the sagittal direction is insufficient and an image in a high peripheral image is obtained. The spread of is large.
  • [0005]
    The present invention has been made in view of such a situation, and an object of the present invention is to provide a single focus lens in which various aberrations capable of quick autofocus with a large aperture ratio of about F1.4 are satisfactorily corrected. And.

via asobinet

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Sony Savings Sunday: Tamron, Sigma, and Laowa Savings


Tamron 17-28mm f/2.8 Di III RXD FE Save $50:
B&H Photo /  Amazon / Adorama
Tamron 70-180mm f/2.8 Di III RXD FE Save $100:
B&H Photo / Amazon / Adorama
Tamron 28-200mm f/2.8-5.6 Di III RXD FE Save $80:
B&H Photo / Amazon / Adorama

Tamron 20mm F/2.8 Di III OSD M1:2 Save $50:
B&H Photo / Amazon / Adorama
Tamron 24mm F/2.8 Di III OSD M1:2 Save $50:
B&H Photo / Amazon / Adorama
Tamron 35mm F/2.8 Di III OSD M1:2 Save $50:
B&H Photo / Amazon / Adorama

Sigma 150-600mm f/5-6.3 DG DN OS Sports Save $100:
B&H Photo / Amazon / Adorama
Sigma 100-400mm f/5-6.3 DG DN OS Save $50:
B&H Photo / Amazon / Adorama
SIGMA 28-70mm f/2.8 DG DN Contemporary Save $100:
B&H Photo / Amazon / Adorama
SIGMA 24-70mm F2.8 DG DN Art Save $30:
B&H Photo / Amazon / Adorama

Sigma 16mm F1.4 DC DN | Contemporary Save $75
B&H Photo / Amazon / Adorama
Sigma 30mm F1.4 DC DN | Contemporary Save $75
B&H Photo / Amazon / Adorama
Sigma 56mm F1.4 DC DN | Contemporary Save $75
B&H Photo / Amazon / Adorama

Laowa 105mm f/2 Save $220

Laowa 24mm f/14 Save $150

Laowa 10-18mm f/4.5-5.6 Zoom Save $150

Laowa 12mm f/2.8 Zero-D Lens for Canon EF and Magic Shift Converter MSC Save $100

Laowa 12mm f/2.8 Zero-D Save $100

Laowa 15mm f/2 FE Zero-D Save $100

Laowa 9mm f/5.6 FF RL Save $80

Laowa 15mm f/4 Macro Save $50

Laowa 100mm f/2.8 2X Ultra Macro APO Save $50

Laowa 85mm f/5.6 2x Ultra Macro APO Save $49

Laowa 65mm f/2.8 2x Ultra Macro APO Save $40

Laowa 60mm f/2.8 2X Ultra-Macro Save $40

Laowa 25mm f/2.8 2.5-5X Ultra Macro Save $40

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Laowa Nanomorph Anamorphic 27mm, 35mm, and 50mm Coming May 17th, 2022 at 10 am EDT


Venus Optics launched an indiegogo for its latest Super35 compact anamorphic cine lenses. The launch date will be May 17th, 2022 at 10 am EDT and they have some attractive early bird specials that you can see below.


1/ Patented anamorphic design
2/ Revolutionarily tiny and compact
3/1.5x constant squeeze ratio
4/ Gorgeous amber and blue flare version
5/ Artistic oval bokeh
6/ Short closest focusing distance
7/ Various mounts available
8/ Professional cine housing

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Laowa FF II 90mm F2.8 CA-Dreamer Macro 2X Specs and More Photos

We just became aware of the Laowa FF II 90mm F2.8 CA-Dreamer Macro 2X yesterday and now we have some high-quality photos and the specs thanks to CameraBeta.

Specs

  • 13 optical structures in 10 groups
  • including 3 ED lenses and 3 high refractive index lenses
  • 13 aperture blades
  • Close focusing distance is 204mm (the closest working distance is 74mm)
  • filter interface is 67mm
  • size is 74 x 120mm
  • weight is 619g
  • Sony E, Canon RF, Nikon Z, and Panasonic L mounts

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