With Extra-low Dispersion (ED) glass lens element and two aspherical lens elements, the lens offers more true-to-life image reproduction. The image circle in DA-series lenses is designed to perfectly match the 23.5mm x 15.7mm size of the CCD used in PENTAX digital SLRs to optimize camera performance. The new design also contributes to a drastic reduction in size, weight and production cost, compared to 35mm-format counterparts with similar specifications.

• Metal PENTAX KAF Lens Mount
  
• Equivalent focal length to 18.5mm-37mm in the 35mm format with *ist DSLRs
  
• Extra-low Dispersion (ED) glass for superior sharpness and color correction
  
• Responsive “Quick-Shift Focus System” allows instant shift from AF to MF
  
• The image circle is designed to match the CCD used in PENTAX digital SLRs
  
• Comes with a lens hood to minimize flare and ghost images