HD PENTAX-D FA 150-450mmF4.5-5.6ED DC AW

There are many situations where it is not possible to get close to the subject. The best example of this is wildlife photography. Whether in the zoo at home, in a wildlife park or on safari, a lens in this focal length range is an indispensable accessory.

With the 35 mm full-frame sensor of a K-1 Mark II, the focal length range of 150-450 mm is available, and the crop factor of APS-C cameras, such as the K-3 Mark III or the K-F, results in a focal length range equivalent to 230-690 mm. The teleconverter HD Pentax-DA AF REAR CONVERTER 1.4AW (limited image range) extends this range by a factor of 1.4.

Features 

Outstanding image description

This lens is treated with the high-grade, multi-layer High Definition Coating . 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.

By incorporating three super-low dispersion glass elements and one Anomalous Dispersion Glass element in its optics, it effectively minimizes spherical and chromatic aberrations, while producing crisp, high-quality images with edge-to-edge sharpness,  free of color bleeding.

Dustproof, weather-resistant construction

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.
By pairing it with a PENTAX weather-resistant digital SLR camera body, it assures a durable, reliable digital imaging system that performs superbly in demanding shooting settings — even in rain or mist, or at locations prone to water splashes or spray.

SP (Super Protect) Coating

Comparison of wipe-off (oil-based ink) 

A lens surface treated with SP Coating can be wiped clean more easily and completely, even after the ink has dried. 

Newly installed three-position switch for Quick-Shift Focus System

In order to improve its operability, a three-position switch is newly installed on this lens, allowing instant switching among QFS/A, QFS/M and MF modes. QFS/A is an autofocus-priority mode, which allows the user to switch to manual-focusing operation only when autofocus operation is completed. QFS/M is a manual-focus-priority mode, which enables the user to switch to manual focusing at any time — even when the AF system is in operation. MF mode allows the user to instantly switch to manual focusing with a simple twist of the focus ring on the lens. With a choice of three distinctive modes, the user is assured of speedier, more accurate focusing operation for a given subject or application.

Four AF buttons installed on the lens barrel

In order to provide more stable AF operation and better hold of the lens regardless of the camera’s orientation — horizontal or vertical — this lens provides four AF buttons on its barrel — one at every 90 degrees.* The user can assign preferred settings to these AF buttons, including: a Focus Preset mode to preprogram the focus position and instantly shift the focus to that position; and an AF Cancel mode to intentionally fix the focus at a desired point during Continuous AF operation.
* Corresponding models are K-1 Mark II, K-1, KP, K-3II, K-3, K-70, K-S2, K-S1. For K-3 and K-S1, Firmware upgrade is required.

Other features 

• 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
• Zoom lock lever to prevent the lens barrel from free-falling
• Detachable tripod mounting with a newly designed anti-falling mechanism

【MTF Chart】

Geometric optics MTF (MTF calculated without referencing the effects of light diffraction phenomenon) 

Wave optical MTF (MTF calculated referencing the effects of light diffraction phenomenon)

Sample Images 

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