Tag Archives: Sigma 23mm f/1.4

Sigma 20mm f/1.4 and 23mm f/1.4 Patents Found

overview [Publication number] P2024035865 [Release date] 2024-03-15 [Name of the invention] Large aperture ratio optical system [Application date] 2022-09-05 [Applicant] [Identification number] 000131326 [Name] Sigma Co., Ltd. [Problem] To realize a large aperture ratio optical system that uses an inner focus method while reducing the weight of a focus lens. [Background Art] [0002] In recent […]

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

Sigma 28-70mm f/2.0 full frame 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 Sigma 14-30mm f/4.0 full frame Focal length: 14.42-29.10 F value: 4.00 Angle of view: 117.62-71.79 Image height: 21.63 Overall length: 96.04-74.39 Sigma 20mm f/1.4 APS-C Focal length: 20.00 F value: 1.46 Angle of view: […]

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