Pentax 21mm f/3.2 AL Limited HD DA

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Lens Specifications
Name Pentax 21mm f/3.2 AL Limited HD DA
Image Circle APS-C
Type Wide Prime
Focal Length 21mm
APS Equivalent 32mm
Max Aperture f/3.2
Min Aperture f/22
Diaphragm Blades 7 (rounded)
Lens Construction 8 elements in 5 groups, including 1 hybrid aspherical element
Diagonal Angle of View(Based on image circle) 68 degrees
Focus Details "Quick Shift" AF/MF mechanism
Front Element Rotation No
Zoom System n/a
Closest Focus 20cm / 7.9 in.
Magnification Ratio 0.17x / 1:5.9
Filter Size 43mm or 49mm
Dimensions(Length x Diameter) 25mm x 63mm / 1.0 in. x 2.5 in.
Weight 134g / 4.2 oz. (without hood)
Notes Available in black or silver; Dual filter attachment design: 43mm filters on the hood, and 49mm filters on the lens (without use of the hood); High-grade multi-layer HD (High Definition) coating; Rounder aperture blades should yield more pleasing bokeh.
Typical Online Price US$700