Focal Length 77mm, Equivalent to 118mm in 35mm format (when attached to PENTAX APS-C size DSLR cameras)
Maximum Aperture F1.8
Minimum Aperture F22
Lens Construction 7 elements in 6 groups
Angle of View (Diagonal) 31.5°, 21° (when attached to PENTAX APS-C size DSLR cameras)
Mount KAF
Minimum Focusing Distance 0.7m (2.3 ft.)
Maximum Magnification 0.14x
Filter Diameter 49mm
Diaphragm Control Fully automatic
Number of Diaphragm Blades 9
Rounded diaphragm （77mm:F1.8-F4）
Aperture Ring equipped
Tripod Mount N/A
Maximum Diameter x Length approx. 64mm x 48mm (approx. 2.5in. x 1.9in.)
Weight approx. 270g (approx. 9.5oz.)
Temperature -10°C～40°C (14°F～104°F)
Humidity 85% or less (no condensation)