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Optical Construction: 14 elements/11 groups. Multicoated.
Accessory Size: 67mm
Angles of Acceptance: 74° - 29°
@ 28mm: f/2.8 – f/16 @ 85mm: f/3.8 – f/22
Minimum Focusing Distance from Film Plane: 0.26m (10.2in.)
Maximum Reproduction Ratio: 1:4 (1/4 life-size) @ 28mm
Length at Infinity Focus
@ 28mm: 105mm (4.2in.) @ 85mm: 120mm (4.8in.)
Barrel Diameter: 70mm (2.8in.)
Weight: 658g (1.45lb.)
Weights and measures vary slightly according to lens mount.
From Kiron Instruction Manual Code No 1000028 dated 9/81