Aperture range: F14-22 Maximum Diameter: 3.1 inches (78mm).9 elements in 7 groups Angle of view 283 degrees. Optical Construction: 9 Glass elements in 7 Groups Minimum focusing distance : 33 feet Filter size: 72mm removable lens hoodLens features UMC super multi-layer coating to reduce flare and ghosting Lens not zoomable