With a medium range 4X telephoto zoom in an affordable, durable package, this lens catches medium- to long-distance objects and everything in between. And it’s weather-resistant, so you can keep exploring even in damp, inclement conditions. Type: Zoom Lens Diameter: 49mm Specifications: LENS MOUNT: PENTAX KAF2 FOCAL LENGTH: 50-200mm (equiv 76.5-307mm) APERTURE: F4-5.6 MIN APERTURE: F22-32 LENS CONSTRUCTION: 11 elements in 10 groups ANGLE OF VIEW: 31.5-8.1° (w/ PENTAX DSLR) MIN FOCUSING DISTANCE: 3.6' (1.1m) MAX MAGNIFICATION: 0.24X DIAPHRAGM CONTROL: Fully Automatic NUMBER OF APERTURE BLADES: 6 MAX DIAMETER x MIN LENGTH: 2.7" x 3.1" (69 x 79.5mm) WEIGHT (W/O HOOD): 10.1 oz (285g) Features: Flexible 4X zoom coverage in the telephoto range. Weather-resistant to handle damp, inclement conditions. The PENTAX-original Quick-Shift Focus System allows instant switching from autofocus to manual focus operation. An Extra-low Dispersion (ED) glass lens element and two aspherical lens elements offer superior sharpness with minimum chromatic and s...