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Minimum Focusing Distance::4.6' (1.4m)Focusing::Quick-shift FocusFocal length::300mm (equiv 460mm)Maximum Aperture:f/4Minimum Aperture:f/32Angle of View:5.4° (w/ Pentax DSLR)Lens Construction:8 elements in 6 groupsMaximum Magnification Ratio:0.24xFilter Diameter:77mmDiaphragm Blades:9Standard Accessory:Tripod Adapter: Included demountable w/ coinCompatible Mount:Pentax KAF2Warranty:PentaxWeight::37.7 oz (1070g)Dimensions::Max Diameter x Min Length: 3.3 x 7.2'' (83 x 184mm)Other:Diaphragm Control: Fully Automatic Supersonic Motor SP (Super Protect) Coating Filter Window Detachable Tripod Mount・High performance telephoto lens・SDM system creates smoother quieter auto focus・Weather resistant and dust resistant body・Quick-shift Focus System for instant switching from auto focus to manual focus・PENTAX SP coating protects the exposed lens elements・ED elements compensate for chromatic aberration・Developed specifically for PENTAX digital SLRs・Focal length equivalent to 450mm in the 35mm formatThe 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. The Pentax 300mm F/4 is commonly used for Landscape/scenery Sports/action Wildlife photos and more.The Pentax 300mm F/4 is most used by customers who consider themselves to be a Photo enthusiast among others.The Pentax 300mm F/4 is popular because customers like the following qualities of the Pentax 300mm F/4: Consistent output Durable Easily interchangeable Fast / accurate auto-focus Nice bokeh Rugged and Strong construction.

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