• Nikon F mount lens •Focal Length: 11–16mm (approx. 16.5–24mm or 17.6–25.6mm full-frame equivalent depending on the camera crop factor) • Maximum Aperture: Constant f/2.8 • Minimum Aperture: f/22 • Optical Construction: 13 elements in 11 groups (including aspherical and Super Low Dispersion elements) • Aperture Blades: 9 blades • Minimum Focus Distance: 0.30 m (1 ft) • Filter Thread Size: 77 mm (non-rotating) • Dimensions (Length x Diameter): Approx. 89.2 mm × 84 mm • Weight: Approx. 550g – 560