Pentax SMC DA* 60-250mm F4.0 ED IF SDM Lens  is a serious zoom telephoto for sports, wildlife, and other applications, this autofocus Lens truly adds an important element to the collection of lenses for the Pentax system.
They've had some little jewels which any brand would covet, but in the telephoto department they've not had a 'big gun' since the film days. Now they do; the DA* 60-250 will give you professional results for many of life's sporting, action, and wildlife opportunities.
The housing of the 60-250mm f/4 ED is ready for harsh conditions, with great dust and weather sealing to go along with the improvements in coating technology to repel moisture and debris from the glass. The DA* 60-250's complex 15-element optical formula features a pair of ED Extra-Low Dispersion glass elements to help reduce any effects of chromatic aberration. Shoot the action into the sun, and expect the edges of your subject to be crisp and clean.
The focusing system of this lens is both SDM and normal Pentax KAF2 (with a screw on lens barrel to drive AF from body-based motors). This allows the lens to move incredibly quickly with the SDM system, driven by an internal motor and with the Quick-Shift system providing manual focus override capacity to you at all times with no buttons to switch. You'll also retain the standard AF performance with the older Pentax digital SLR bodies not featuring SDM capacity.
Note! Not compatible with 'full frame' cameras.
High-performance super telephoto zoom lens with constant f/4.0 aperture throughout zoom range
Two elements of ED (extra-low dispersion) glass
Speedy SDM autofocus motor provides fast, silent response with Quick-Shift full-time manual override
Conventional AF drive built into body provides body-driven AF for older Pentax digital SLRs
Pentax's unique SP water and dirt-repelling coating on both external surfaces
Dust and moisture-resistant housing
9-Bladed aperture diaphragm
Rigid, detachable tripod collar included
Exchange between horizontal and vertical composition by rotating camera within tripod collar (when employing monopod/tripod)
Equivalent to an 90-375mm f/4.0 lens upon 35mm SLR cameras
Dedicated hood with removable window to easily adjust a polarizer's position
Featuring high quality, weather-resistant and dust-resistant construction, SDM autofocus, and extra low dispersion glass, the smc Pentax DA Star 60-250mm F4 ED (IF) SDM, exclusively for Pentax digital SLR cameras, is a versatile telephoto zoom lens for photographers who demand flexibility and the highest quality from their glass.
* Wildlife, sports, long range shots
Unique non-linear shifting system
"Quick Shift" focus system
SDM focus motor
"Super Protect" coating