Focal length: 28mm

Max aperture: 1:2.8

Lens construction: 6 elements in 6 groups

Picture angle: approx 60° (underwater)

Distance scale: 0.26m (0.9ft) to ∞ (underwater) with illumination

Min aperture: f/22

Aperture setting: aperture dial on camera

Diaphragm exposure: fully automatic

Measurement: Via full-aperture method

Attachment size: 88mm (P=1mm)

Dimensions (dia x length): 99mm (3.9in) x 77mm (3.0in) (extension from lens mounting flange)

Weight: approx 550g (1.2lbs)