Focal length: 150mm
Maximum aperture: 2.8
For Pentax SLR Cameras
Minimum Aperture: 22
Lens Construction: 16 Elements in 12 Groups
Angle of View: 16.4 degrees
Number of Diaphragm Blades: 9 Blades
Minimum Focusing Distance: 38cm/15.0 in.
Maximum Magnification: 1:1
Filter Size: 72mm
Dimensions (D x L): 79.6mm x 137mm (3.1 in. x 5.4 in.)
Weight: 895g (31.6 oz.)