This super telephoto zoom lens has been developed to cover focal lengths from 150mm to 450mm - a focal length much in demand by Pentax camera users. It features the original high definition Pentax coating to produce high contrast and sharpness images even under demanding lighting conditions such as backlight. It also incorporates 3 ED glass elements (extra low dispersion) and 1 super extra low dispersion glass element to effectively compensate chromatic aberration. In addition, its dustproof and weather resistant body also makes it very reliable and durable in demanding outdoor situations.
When mounted on a K-frame Pentax DSLR camera body, this zoom lens covers a focal length from 230mm to 690mm in the 35mm format. It has been designed to be compact and light enough to hold in hand during long-duration shooting of subjects such as wildlife, aviation and sports.
Thanks to its optics with state-of-the-art technology that offers 3 elements of ED glass (extra low dispersion) and 1 glass element of super extra low dispersion to effectively compensate the chromatic and aspherical aberration, it allows to obtain clear high quality images without bleeding from color. Its MFT curve (modulation transfer function) is programmed to be superior to those of the conventional models of the same range to offer high resolution images with rich detail. Its image circle is optimized to cover even the image size of 35mm format film SLR cameras. As a result, not only ensures, bright images in high resolution without compromising edge sharpness, even when mounted on a current body of PENTAX digital SLR camera, but is also able to accept future models with higher image sensors size without modifications.
This lens has been treated with a high grade HD * multilayer coating. Compared to conventional multilayer coatings, this original PENTAX coating ensures greater light transmission and less reflection to provide high-contrast bright images free of reflections and ghost lights, even under the most demanding lighting conditions, such as backlight.
* HD means high definition.
The lens has a weatherproof construction with 21 sealed parts (AW - All Weather) to effectively prevent the intrusion of water inside. By pairing with a DSLR camera with weatherproof body, a durable and reliable imaging system with excellent performance in demanding shooting conditions is guaranteed - even in rain or fog, or in places prone to water splash or spray .
New three-position switch for Quick-Shift focusing system
The lens is equipped with the Quick-Shift focusing system developed by PENTAX, which allows the user to immediately switch to manual focus operation after the subject is captured by the camera's autofocus system. In order to improve its operability, the new three-position switch has been installed, allowing instantaneous switching between the QFS / A, QFS / M and MF modes. QFS / A is an auto-focus priority mode that allows the user to switch to manual focus operation only when auto-focus operation is complete. QFS / M is a manual focus priority mode, which allows the user to switch to manual focus at any time - even when the AF system is operating. MF mode allows the user to instantly switch to manual focus with a simple turn of the lens's focus ring. With a choice of three distinctive modes, the user has the security of a faster and more precise focusing operation to capture a subject or a certain scene.
In order to provide more stable AF operation and better lens hold regardless of the orientation of the camera - horizontal or vertical - this lens provides 4 AF buttons on its cylinder - one in every 90 degrees. ** User can assign preferred settings to these AF buttons, including: a focus preset mode to pre-program the focus position and immediately change the focus to that position; and a mode of canceling AF to intentionally fix the focus at a desired point during continuous AF operation.
** The PENTAX K-3 is currently the only model compatible with the functions of the AF buttons.
To activate these functions, the camera's firmware must be updated to the latest version.
• Smooth and silent AF driven by a built-in DC motor.
• Rounded diaphragm to produce a beautiful background blur effect (bokeh), and minimize the spot effect of light source stripes.
• Focus distance limiter to minimize the AF operating time by setting the focus range to one of the three sub-ranges
• SP coating (Super Protection) applied to the front surface of the lens to effectively repel water and grease
• Detachable tripod mount with new anti-fall mechanism design
• Zoom lock lever to prevent the lens barrel from sliding forward.
(Extra-Dispersion) Incorporates special lenses for better image quality
(High Definition) Special multilayer coating of the lenses that gives better optical quality, more resolution and greater transparency
(All Weather) Objective sealed to water and dust
(Direct Current) Fast focus motor built into the lens
Standard lens for 35mm cameras (Full-Frame)
|Angle of coverage||APS-C: 10.7 to 3.6 ° / 9.1 to 3.1 ° Full frame: 16.5 to 5.5 ° / 13.7 to 4.6 °|
|Image Format||Full-frame / 35mm|