Tag Archives: Sigma 28-85mm f/2.8

New Sigma 28-85mm f/2.8 Patent

By Louis Ferreira | Published: June 30, 2022

Lens length (mm): 120.04 126.08 142.66 Embodiment 4 Zoom ratio: 2.90 Focal length (mm): 28.79 49.98 83.51 F number: 2.92 2.92 2.92 Angle of view (degree): 75.61 45.42 27.77 Image height (mm): 21.63 21.63 21.63 BF (mm): 17.6146 17.5433 17.5817 Lens length (mm): 135.02 146.97 164.94 Embodiment 5 Zoom ratio: 2.35 Focal length (mm): 28.79 40.00 67.69 F number: 2.92 2.92 2.92 Angle of view (degree): 75.80 55.88 […]

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Sigma Compact 28-85mm f/2.8, 24-70mm f/2.8, and 28-70mm f/2.8 Patents Found

By Louis Ferreira | Published: May 9, 2022

Example 1 (24-70mm F2.8) Zoom ratio 2.75 Wide- angle intermediate telephoto focal length 24.72 39.76 67.98 F number 2.92 2.92 2.92 Full angle of view 2ω 85.24 56.96 34.33 Image height Y 21.63 21.63 21.63 Lens total length 135.00 145.60 171.09 Back focus 17.6206 17.6036 17.5749 Example 3 (28-70mm F2.8) Zoom ratio 2.35 Wide- angle […]

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