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Optical Construction: 7 elements 7 groups*. Multicoated.
Accessory Size: 55mm
Angle of Acceptance: 74°
Aperture Range: f/2.8— f/16
Minimum Focusing Distance from Film Plane: 0.3m (12.0")
Maximum Reproduction Ratio:
Lens alone: 1:7.5
with Reverse Mate**: 1:0.4
Length at Infinity Focus: 44.5mm (13/4")
Maximum Barrel Diameter: 66mm (25/8")
Weight: 266g (9.3oz.)
*Post Aug 1981 and modified lenses have 8 elements in 8 groups.
Weights and measures vary slightly according to lens mount.
From Kiron Instruction Manual Code No 1000003 3/80