Lens Mount PENTAX KAF3 mount
Model No. 21280
Focal Length 15-30mm (in 35mm format) 23-46mm (w/ PENTAX APS-C D-SLR)
Notes HD coating SP coating Weather-Resistant Construction SDM (Supersonic Direct-Drive Motor) Quick-shift Focus System
Angle of View 111° – 72° (w/ PENTAX 35mm SLR) 86° – 50° (w/PENTAX APS-C D-SLR)
Lens Construction(group/elements) 18 elements in 13 groups
Min. Aperture (f) f/22
Min. Focusing Distance 0.28m
Max. Magnification 0.23X
Filter Size N/A
Diameter & Length (mm) 98.5mm x 143.5mm (3.88 x 5.65 inches)
Weight (g) 1040g (2lbs 4oz)
Diaphragm control Fully Automatic
Number of aperture blades 9 (Rounded Aperture: W 15mm: F2.8 – 4 T 30mm: F2.8-5.6)