Patent application for optical systems such as Sigma “18-50mm F2.8-4 OS” and “17-40mm F4 OS” Overview [Public number] P2022158386 [Release date] 2022-10-17 [Title of Invention] Imaging Optical System [Application date] 2021-04-02 [Applicant] [Identification number] 000131326 [Name] Sigma Corporation Kind Code: A1 A compact image forming optical system having a small open F value over the […]
Samyang AF 135mm f/1.8 FE: B&H Photo / Amazon / Adorama Sony 135mm f/1.8 GM: B&H Photo / Amazon / Adorama Lenstips posted reviews for the Sony 135mm and Samyang 135mm a few days ago and it shouldn’t come as a surprise, but the Samyang lens arguably comes out on top. You can view the Sony 135mm review here and Samyang 135mm review […]
Digicame-info found some interesting wide-angle Sigma zoom lens patents that are f/1.8. The Sigma 15-24mm f/1.8, 16-28mm f/1.8, and 18-30mm f/1.8 could all be useful zooms, but they will likely be very expensive given their fast apeture. ･IP Force Applicant: Sigma Co., Ltd. Publication number: P2022126058 Application number: P 2021023909 Publication date: 2022-08-30Title of invention: […]
SIGMA CINE LENS FF High Speed Prime Line 65mm T1.5 FF development announcement Sigma Corporation (President: Kazuto Yamaki) is pleased to announce the development of a 65mm T1.5 FF for the FF High Speed Prime Line of the SIGMA CINE LENS interchangeable lenses for video production. The 65mm T1.5 FF is one of the FF High […]
Sigma 24mm f/1.4 DG DN Art: B&H Photo / Amazon / Adorama Sigma 20mm f/1.4 DG DN Art: B&H Photo / Amazon / Adorama Reviews / Hands-on / Preview / Etc… Explora Sonyalpha Sigma 20mm F1.4 DG DN Art Sonyalpha Sigma 24mm F1.4 DG DN Art Videos
20mm F1.4 DG DN Art Lens configuration: 17 elements in 15 groups (2 SLD glasses, 3 aspherical lenses) Number of aperture blades: 11 (circular aperture) Minimum shooting distance: 0.23m Maximum shooting magnification: 1: 6.1 Filter Diameter: 82mm Size: φ87.8 x 111.2mm (E-mount version 113.2mm) Weight: 635g (E-mount version 630g) 24mm F1.4 DG DN Art Lens […]