Smooth, quiet AF operation using a lens-installed AF driving motor
Round-shaped diaphragm to produce a natural, beautiful bokeh (defocus) effect, while minimizing the streaking effect of point light sources
Focus range limiter to minimize AF operation time by fixing the focus range to one of three sub- ranges
SP (Super Protect) coating to keep the front surface free of dust and stains
Zoom lock lever to prevent the lens barrel from free-falling
Detachable tripod mounting with a newly designed anti-falling mechanism
Super-telephoto coverage with three-times zoom ratio
Outstanding image description
Improved Quick-Shift Focus System
Focus Range Limiter
Four AF buttons installed on the lens barrel
Dustproof, weather-resistant construction
HD Coating to optimize image rendition
Compared with conventional multi-layer coatings, this PENTAX-original coating assures higher light transmittance and less reflection to deliver bright, high-contrast images free of flare and ghost images, even under demanding lighting conditions such as backlight.
This lens is equipped with 4 AF buttons, which provide more stable AF operation and better hold of the lens regardless of whether the user is shooting photos with the camera in a vertical and horizontal position. The user can assign preferred settings to these AF buttons including a Focus Preset Mode and AF Cancel Mode.
Focus Range Limiter minimizes AF operation time by allowing the user to fix the focus range to one of three sub-ranges — Full, close range (2 to 6m)* or far range (6m to ∞).
*This limiter does not operate in manual focus.
The PENTAX-original Quick-Shift Focus System allows instant switching from autofocus to manual focus operation. Operability has been improved thanks to a three-position switch installed on this lens, allowing instant switching among QFS/A, QFS/M and MF modes.
Developed as an AW (All Weather) model, this zoom lens features a dependable dustproof, weather-resistant construction with 21 special seals to prevent the intrusion of water and dust particles into the lens interior.
Thanks to its state-of-the-art optics featuring three ED (Extra-low Dispersion) Glass elements and one Anomalous Dispersion Glass element, this zoom lens effectively minimizes spherical and chromatic aberrations, while producing crisp, high-quality images free of color bleeding.
Photo by Yoshiaki Kobayash
This zoom lens covers a super-telephoto range from 150mm to 450mm. It is designed to be compact and light enough to handhold during long-range shooting of such subjects as wildlife, aircraft and sports.