Features:
Aperture range: f/1.8-16
Fast constant aperture of F/1.8
Designed for APS-C sensors
35mm equivalent focal length: 28.8-56mm
Hyper Sonic AF motor
Internal focusing and zoom design
Four aspherical & 5 SLD glass elements
Super Multi-Layer Coating
Lens mount Nikon DX
Compatible with Sigma USB Dock
Optical construction: 17 elements in 12 groups
Number of aperture blades: 9
Angle of view (SD1): 76.5º -44.2º
Maximum aperture: F/1.8
Minimum aperture: F/16
Minimum focusing distance: 28cm
Maximum magnifications: 1:4.3
Filter Size: 72mm
Dimensions: 78 x 121.0 mm
Weight: 810g