• 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 300mm in the 35mm format
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