PRODUCT HIGHLIGHTS

Dependable weather-resistant construction

SP (Super Protect) Coating keeps the lens front surface free of dust or stains

• Built-in motor to drive the AF mechanism for smooth, quiet autofocus operation

• Eight-blade circular diaphragm produces beautiful light beams with point light sources, while creating a natural, beautiful bokeh (defocus) effect at open and larger apertures

• QFS/A (Quick-Shift Focus System) for instant shift to the manual-focus mode without requiring focus-mode switching operations, after the subject has been captured in focus by the camera’s autofocus system

Focal Length   21mm
                        Equivalent to 32mm in 35mm format (when attached to PENTAX APS-C size DSLR cameras)
Maximum Aperture   F2.4
Minimum Aperture   F22
Lens Construction   11 elements in 8 groups
Angle of View (Diagonal)   92°
                                           68° (when attached to PENTAX APS-C size DSLR cameras)
Mount  KAF4
Minimum Focusing Distance   0.18m (0.6ft.)
Maximum Magnification   0.26x
Filter Diameter   67mm
Diaphragm Control   Electromagnetic diaphragm Fully automatic
Number of Diaphragm Blades   8
Rounded diaphragm (21mm: F2.4-F4.5)
Aperture Ring  N/A
Tripod Mount  N/A
Lens Hood  Fixed
Maximum Diameter x Length   approx. 74mm x 89mm (approx. 2.9in. x 3.5in.)
Weight   approx. 416g (approx. 14.7oz.)