Pentax SMC DA* Series 16-50mm f/2.8 ED AL IF SDM Wide Angle Zoom Lens for Pentax Digital SLR Cameras
Designed for exclusive use with Pentax digital SLR cameras, the Pentax DA* 16-50mm f/2.8 wide-angle zoom lens is a terrific choice for landscapes, portraiture, and just about any other application. The lens features a tightly sealed, weather-resistant and dust-resistant construction to enhance durability in rainy or dusty conditions. The lens's three aspherical elements and two special optical glass elements, meanwhile, help compensate for chromatic and spherical aberration, producing images with superior contrast, clarity, and edge-to-edge sharpness. And thanks to the lens's Pentax-original Quick-Shift Focus System, you can easily and instantly switch from autofocus to manual focus.SpecificationsFocal length: 16-50mmMaximum aperture: f/2.8Minimum aperture: f/22Lens construction: 15 elements in 12 groupsAngle of view: 83 to 31.5 degrees (when used with Pentax digital SLR camera body)Number of diaphragm blades: 9Metering system: TTL open-aperture meteringMinimum focusing distance: 0.3 metersMaximum magnification: 0.21xFilter size: 77mmCorresponding AF mounts: Pentax KAF2Dimensions: 3.3 inches in diameter and 3.9 inches longWeight: 19.9 ounces (without hood)Warranty: 1 year