The latest firmware upgrades for the Sigma sd Quattro and sd Quattro H cameras is designed to improve performance in low temperatures.
Sigma announces new lenses
https://www.photoreview.com.au/news/sigma-announces-new-lenses/Sigma has revealed details of two lenses that will be showcased at CP+: the 70mm f/2.8 DG MACRO Art and 105mm f/1.4 DG HSM Art, plus some future lenses for the Sony E-mount.
Sigma 14-24mm F2.8 DG HSM | Art lens in development
https://www.photoreview.com.au/news/sigma-14-24mm-f28-dg-hsm-art-lens-in-development/Sigma Corporation has announced the development of a new 14-24mm f/2.8 DG HSM Art lens designed to provide an ultra-wide angle of view with 50-megapixel-plus cameras.
Sigma announces 16mm f/1.4 DC DN lens for mirrorless cameras
https://www.photoreview.com.au/news/sigma-announces-16mm-f14-dc-dn-lens-for-mirrorless-cameras/Sigma has announced a new 16mm f/1.4 DC DN lens for its Contemporary range for M4/3 and Sony E mount cameras.
Sigma issues advisory to Canon DSLR users
https://www.photoreview.com.au/news/sigma-issues-advisory-to-canon-dslr-users/Sigma has issued a warning that some interchangeable lenses for Canon are not fully compatible with the EOS 6D Mark II, EOS 77D, EOS 800D and EOS 200D cameras.
Firmware updates for six Sigma cameras and two lenses
https://www.photoreview.com.au/news/firmware-updates-for-six-sigma-cameras-and-two-lenses/Sigma has issued firmware updates for its six Quattro-branded cameras as well as the 100-400mm Contemporary lens and MC-11 EF-E converter.
Firmware update for Sigma sd Quattro
https://www.photoreview.com.au/news/firmware-update-for-sigma-sd-quattro/Sigma Corporation has released a firmware update for its sd Quattro cameras that adds the ability to save images in DNG.RAW format plus other bug fixes.
Sigma unveils four new lenses
https://www.photoreview.com.au/news/sigma-unveils-four-new-lenses/Sigma has announced four new models for Global Vision Art and Contemporary lenses ahead of the 2017 CP+ Camera + Photo Imaging Show, which opens tomorrow in Tokyo.
Sigma 12-24mm f/4 DG HSM Art lens
https://www.photoreview.com.au/reviews/lenses/full-frame/sigma-12-24mm-f4-dg-hsm-art-lens/An ultra-wide angle zoom lens with minimal distortion, a constant f/4 maximum aperture and improved autofocusing.
Sigma 30mm f/1.4 DC HSM Art lens
https://www.photoreview.com.au/reviews/lenses/other-ilc/sigma-30mm-f14-dc-hsm-art-lens/An updated standard prime lens for APS-C cameras, which features telecentric optics and a linear hypersonic AF motor.