Pentax SMCP-DA ED Autofocus Fisheye 10-17mm F/3.5-4.5 (K-Mount) LEN1225

Focal Length - 10 to 17mm f/Stop Range - 3.5-22 (4.5-32 at 17mm) Minimum Focus Distance - 5.6" (14.3 cm) 1" (2.5 cm) in Macro mode Maximum Aperture - f/3.5 to 4.5 Angle of View - 180 to 100° Lens Mount - Pentax K Groups/Elements - 8/10 Lens Format Coverage - APS-C Angle of View - 180° to 100° Maximum Diameter - 2.7" (68 mm) Minimum Focus Distance - 5.52" / 14 cm Optical Design - 10 Elements in 8 Groups Diaphragm Blades - 6 Focus Type - Autofocus