Product Description
Thanks to its large-aperture design, it provides a large maximum aperture
of F2.8 at all focal lengths from 70mm to 200mm
Coupled with other PENTAX-original lens-coating technologies " such as the newly
developed Aero Bright Coating II assuring exceptionally low reflectance, and the
high-grade HD Coating " it produces extra-sharp, high-contrast images free of
flare and ghost images, even under demanding lighting conditions such as in
backlight. In addition to four Anomalous Dispersion Glass elements and two ED
(Extra-low Dispersion) Glass elements, its optics includes a pair of new Super
ED glass elements to effectively compensate chromatic aberration over the entire
zoom range and deliver crisp, high-resolution images with edge-to-edge
sharpness.
High-performance Star (★)-series lens with large F2.8 maximum aperture
This telephoto zoom lens has been developed as a new model of the
high-performance Star (★) series, which assures exceptional image rendition with
edge-to-edge sharpness by effectively compensating various aberrations to a
minimum. It provides a zoom ratio of approximately 2.9 times to cover a
telephoto range from 107mm to 307mm in the 35mm format. Since it provides a
large maximum aperture of F2.8 over the entire zoom range, it is ideal for
portraiture with beautifully defocused foreground/background and sports
photography demanding high shutter speeds to freeze the action.
State-of-the-art optical technology
This zoom lens is treated with the newly developed Aero Bright Coating II " a
lens-coating nanotechnology that employs a super-low refractive film fabrication
process to assure light reflectance lower than that of the conventional Aero
Bright Coating.
Dustproof, weather-resistant construction
Developed as an AW (All Weather) model, this zoom lens features a dependable
dustproof, weather-resistant construction with 13 special seals to prevent the
intrusion of water and dust particles into the lens interior.
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