Pentax DA* 60-250mm F:4.0 ED When mounted on a PENTAX digital SLR camera body, this zoom lens provides focal lengths from 92mm to 383mm in the 35mm format. Its 4.2-times zoom ratio covers a broad telephoto range, making it ideal for capturing various sports scenes and portraits.
Two extra-low dispersion (ED) optical elements are incorporated into the optics for minimal chromatic aberrations. A unique nonlinear shifting system employed in the zoom mechanism effectively reduces field curvature aberrations and assures solid image-description performance at all focal lengths.
The large F4 maximum aperture is retained over the entire zoom range to assure a faster shutter speed or reduce the depth of field.
An innovative hybrid AF system offers both extra-smooth, super-quiet SDM autofocus operation using a supersonic motor installed in the lens body and conventional autofocus operation using a motor built into the camera body. |