Pentax 14mm f/2.8 DA ED (IF) Lens for Pentax and Samsung Digital SLR Cameras Extra-low Dispersion (ED) glass lens 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 Convert focal length to 21mm with *ist D Comes with a lens hood to minimize flare and ghost images