The high performance DA* 300mm ED (IF) lens incorporates an SDM system which creates a smoother, quieter auto focus.
Featuring a Quick-shift Focus System, switching from auto focus to manual is instantaneous. Weather and dust resistant, it's the perfect lens for extreme weather conditions.
Developed specifically for PENTAX digital SLRs, the DA* 300mm ED (IF) SDM lens has PENTAX SP coating which protects the exposed lens elements, and a focal length equivalent to 450mm in the 35mm format.
Minimum Focusing Distance 4.6' (1.4m) Focusing Quick-shift Focus Focal length 300mm (equiv 460mm) Maximum Aperture f/4 Minimum Aperture f/32 Angle of View 5.4° (w/ Pentax DSLR) Lens Construction 8 elements in 6 groups Maximum Magnification Ratio 0.24x Filter Diameter 77mm Diaphragm Blades 9 Standard Accessory Tripod Adapter: Included, demountable w/ coin Compatible Mount Pentax KAF2 Warranty Pentax Weight 37.7 oz (1070g) Dimensions Max Diameter x Min Length: 3.3 x 7.2" (83 x 184mm)