Example 1 Focal length: 24.00 F value: 2.07 Angle of view: 90.08 Image height: 21.63 Overall length: 90.00 Example 2 Focal length: 28.00 F value: 2.07 Angle of view: 79.98 Image height: 21.63 Overall length: 90.00 Example 3 Focal length: 20.00 F value: 2.06 Half angle of view: 100.46 Image height: 21.63 Overall length: 90.00 … Continue reading Sigma 20mm f/2, 24mm f/2, and 28mm f/2 Patents Found