Pentax SMC DA* Series 16-50mm f/2.8 ED AL IF SDM Wide Angle Zoom Lens for Pentax Digital SLR Cameras

The PENTAX DA * 16-50mm F2.8 ED/AL (IF) wide angle zoom lens is designed for exclusive use with PENTAX digital SLR cameras and delivers the highest level of ultimate optical image quality. With aspherical elements, special optical-glass elements and original lens coatings, this lens is superior in terms of contrast, clarity and edge-to-edge sharpness. The 16-50mm features tightly sealed, weather-resistant and dust-resistant construction to enhance durability for use in rain or dusty conditions. It also features the PENTAX-original Quick-Shift Focus System for instant switching to manual-focus operation and PENTAX-original SP (Super Protect) coating to repel dust, water and grease. A new SDM system has been incorporated for smoother, quieter autofocusing operation using a built-in supersonic motor. Pentax SP coating protects the exposed lens elements Two ED elements and 3 aspherical elements compensate for chromatic and spherical aberration Developed specifically for Pentax digital SLR\'s Focal length equivalent to 24.5mm to 76.5mm in the 35mm format Accepts 77mm Filter Unit Dimensions (diameter x length) - 3.3 x 3.9 (84mm x 98.5mm); Weight - 19.9 oz. (565g) without hood; 21.2 oz. (600g) with hood (Amazon)