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Sigma Patent - 18-50mm F2.8 Lens With Optical Image Stabilization

Sigma 18-50mm F2.8 Lens image

On Sep 26, 2006 Sigma announced the 18-50mm F2.8 (Amazon | B&H) lens for APS-C DSLRs.  After that they announce 17-50mm F2.8 lens (B&H | Amazon) on Feb 10, 2010 as a successor of 18-50mm F2.8 lens with IS and improved optics.

Now, a new patent surfaced over the web that shows new version of Sigma 18-50mm F2.8 Lens with IS.

Take a look at the patent details below

SIGMA filed patent of 18-50 mm F2.8 for APS-C sensor with very short back focus.
This patent may be for one of new dp/DPs.

【公開番号】特開2017-211496(P2017-211496A) click here

Specification and lens arrangement of embodiment 1
Focal length: 17.55 – 48.47 mm
F No.: 2.92
2ω: 81.42 – 32.32
Image height: 13.49 – 14.20 mm
Back focus: 1.0000 – 22.4957 mm
Lens length: 126.29 – 166.99 mm

If a true successor of  18-50mm F2.8 is coming After 10 years of Gap we do expect a lot of improvement in optics, AF speed, IS and overall performance of the upcoming Sigma APS-C lens.

We will update you soon as we get any new information. Also see Sigma new Foveon image sensor patent.


Sigma Patent - New Foveon Sensor

Sigma new sensor patent

One of the biggest news coming from Sigma, Sigma is working on a new Foveon image sensor dedicated for Video purpose. For more details you can look at description below.

Foveon sensor image

Take a look at the patent details below (Translated)
PROBLEM TO BE SOLVED: To provide a high resolution still picture and moving picture using a multi-layer sensor in which all pixels have three or more color photoelectric conversion layers and which do not generate false color in principle, while reducing the data amount And performs high-speed readout.
An image pickup device having color separation in a thickness direction of an element and having photoelectric conversion layers of three or more colors, and control means for controlling reading of the image pickup element. In the image pickup device 200, the pixel information is read out by predetermined resolution for each layer separated in the thickness direction in the thickness direction, and at least one layer out of the color-separated layers of the image pickup element has the pixel information Is read out, and at least one layer is read out pixel information with a resolution lower than the highest resolution. The control unit 130 acquires luminance information from the pixel information of the layer read out with the highest resolution out of the layers separated from the color and outputs the pixel information of the layer other than the layer read out with the highest resolution Color information is acquired from pixel information of each layer so as to have the same resolution.

Patent Details
[Issuing country】 Japan Patent Office (JP)
[Publication type] Published patent publication (A)
[Publication number] Japanese Patent Application Laid-open No. 2017-208651 (P2017-208651A)
[Publication date] November 24, 2017
Title of the Invention Imaging device


Sigma 16mm F1.4 DC DN Sample Images

Sigma 16mm F2.8 Lens

Well, yes we do have the samples captured by Sigma 16mm F1.4 DC DN (See development announcement here). The lens is specifically made for E-Mount and M4/3 camera. But, Sample image was captured by Sony A7R II Camera, Actually Sony A7R II camera is used here as a APS-C sensor camera @ 18 MP mode.

Take a look at the sample image and do share your thought with us

Download the full size samples from here

SIGMA 16mm F1.4 DC DN Lens Development Announcement

Sigma Lens

SIGMA announced development of world first 16mm F1.4 DC DN Lens for Sony APS-C Mirrorless cameras as well as M 4//3 mounts. This lens features high grade optics and STM motor for silent and fast AF.

Major Features:

  • Fast Hybrid AF
  • Dust- and splash-proof design
  • Designed to minimize flare and ghosting
  • Image quality rivaling that of our Art line lenses
  • Bright prime functionality to experience photography at its best
  • Accessories Included: Petal Type Lens Hood (LH716-01), Rear and Front Cap
  • “Made in Japan” with outstanding craftsmanship

Continue reading SIGMA 16mm F1.4 DC DN Lens Development Announcement

Sigma Patent - 14mm F1.2 and 35mm F1.2

Latest patent surfaced over the, that shows sigma is working on 14mm F1.2 and 35mm F1.2 Lens.

Patent Details
Specification and lens arrangement of embodiment 6
Focal length: 13.92 mm
F No.: 1.28
2ω: 81.14
Image height: 10.82 mm
Lens length; 105.02 mm



Specification and lens arrangement of embodiment 7
Focal length: 34.98 mm
F No.: 1.28
2ω: 33.12
Image height: 10.82 mm
Lens length; 110.14 mm

We have already published that Sigma is working on 12mm F1.4 MFT Lens and 8mm F1.8 lens for MFT


SIGMA Patent 12mm F1.4 MFT Lens

Sigma filed a patent of 12mm F1.4 for m4/3 lens.It’s a good news for M4/3 owners that Sigma is finally taking interest in M4/3 systems cameras. In Future we do expect ART series lenses dedicated for M4/3 system cameras.

Sigma MFT lens patent

Also take a look at the translated text from Sigma

FT san suggests that the embodiment 1 is same to “LEICA DG SUMMILUX 12mm / F1.4 ASPH” of Panasonic. That’s optical formula of both the lenses look exactly same.

Stay with us for LIVE camera rumors | See more Sigma Patents


Sigma 12mm M4/3 Lens Patent

Sigma patent 12mm F1.4 M4/3 lens patent surfaced over the web. From its focal length and aperture its look like they are planning to announce a new ART series for M4/3 mount. Take a look at the patent details below.

Patent details (Translated)
Subject distance: INF 40 times 200 mm
Focal length: 12.35 12.35 12.32
F number (F number): 1.47 1.48 1.50
full angle of view 2ω (Angle of view): 88.12 88.02 87.77
image height Y (image height): 10.82 10.82 10.82
total lens length (lens length): 86.00 86.00 86.00 eXAMPLE 1 embodiment 1] [ Aberrations at INF] [ Aberration chart at close range Aberrations at 200 mm]

We have also published Sigma Patent – 8mm F1.8 Fisheye For MFT System.

However, earlier Sigma have denied the rumors that Sigma is entering in M4/3 lens mount. But, its look like they have changed their mind.