Pentax SMC PENTAX DA* 16-50mm f/2.8 ED AL (IF) SDM Zoom

Lens Mount: PENTAX KAF2 Mount
Lens Construction: 15 elements in 12 groups
Angle of View: 83 - 31.5 degrees
Aperture: F2.8
Aperture Control: Automatic
Number of Diaphragm Blades: 9
Minimum Aperture: F22 M
etering System: TTL open-aperture metering
Minimum Focusing Distance: 11.9 inches
Filter Diameter: 77mm
Maximum Magnification: 0.21X
Dimensions: 3.3\" x 3.9\" (84mm x 98.5mm)
Weight: 19.9 oz. (565g) without hood; 21.2 oz. (600g) with hood
Case: S100-140
Objective Cap: O-LC77
Hood: PH-RBK 77mm
Lens Aperture Ring: N/A
Tripod Adapter: No
Diaphragm Control: Fully Automatic
Focal Length: 16-50mm (equiv. 24-75mm0
Notes: Supersonic motor, Quick-shift focus, SP (Super Protect) coating, Filter window