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.)