Tag Archives: Sigma 20mm f/1.4

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

By Louis Ferreira | Published: March 16, 2024

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 20mm f/1.4 and 23mm f/1.4 Mirrorless APS-C Patent Found

By Louis Ferreira | Published: March 2, 2022

Sigma 20mm f/1.4 APS-C Focal length: 20.00 F value: 1.46 Angle of view: 74.82 Image height: 14.20 Overall length: 94.00 Sigma 23mm f/1.4 APS-C Focal length: 23.00 F value: 1.46 Angle of view: 65.76 Image height: 14.20 Overall length: 94.00 Back focus: Sigma 16mm f/1.4 DC DN Contemporary B&H Photo / Amazon / Adorama Sigma 30mm f/1.4 DC DN […]

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