Rokinon 85mm F1.4 Aspherical Lens for Nikon AE with Automatic Chip: Technical Information Focal Length: * 85mm Aperture Range: * f/1.4 to f/16 Focus Distance: * 3.3" Filter Attachment Diameter: * 72mm Lens Construction: * 9 elements in 7 groups Viewing Angle: * 28.3 degrees Physical Characteristics Dimensions: * 6.0" x 3.5" x 3.5" Weight: * 2 lbs Compatibility: * Nikon AE cameras