Tag Archives: Sigma 28-85mm f/2.8

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

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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