• Image circle covering Full-frame sensor
• 3X ratio telezoom (eq. to 107-307mm for APS-C)
• Wide constant aperture F2.8
• Achieves sharp depiction and natural bokeh
• Suitable for shooting portraits from a distance
• Dependable weather-resistant construction against humidity and dust (13 protection joins)
• Smooth, quiet autofocus operation driven by a built-in DC motor
• New Aero Bright Coating and HD Coating to optimize light transmittance and minimize reflection
• ED lens elements for brilliant sharpness and saturated colours
• Focus Range Limiter (Full, 1.2-4.0m, 4m-8) to minimize AF operation time
• Round shaped diaphragm to produce beautiful bokeh
• Super Protect coating of the front lens element for effective protection
• Three-position switch for Quick-Shift Focus System (QFS/A, QFS/M and MF modes) for a speedier and more accurate focusing operation for a given subject or application
• Detachable tripod mounting with a newly designed anti-falling mechanism

1. 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. When mounted on a PETAX K-mount SLR camera body, 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. Its image circle is optimized to cover even the image size of 35mm filmformat SLR cameras. As the result, it not only assures brilliant, high-resolution images without compromising the sharpness at edges even when mounted on an existing PENTAX digital SLR camera body, but it is also capable of accepting future models with larger image sensors without modifications.

2. 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.* By coupling this advanced lens coating with the high-grade, multi-layer HD Coating** that reduces an average reflectance in a visible ray spectrum to less than 50% of conventional multi-layer coatings, this lens effectively reduces flare and ghost images to a minimum even under demanding lighting conditions such as backlight. In its optics, it also features four super-low dispersion glass elements, two ED (Extra-low Dispersion) glass elements, and two Super ED glass elements, which have optical properties similar to fluorite and assure lower light dispersion and more effective compensation of chromatic aberration. As the result, this lens produces brilliant, high-contrast images with edge-to-edge sharpness, while effectively compensating chromatic aberration over the entire zoom range.

3. 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. 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.

4. Newly installed three-position switch for Quick- Shift Focus System
The lens is equipped with the PENTAX-developed Quick- Shift Focus System, which allows the user to instantly switch to manual-focus operation after the subject is captured in focus by the camera’s AF 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.

5. 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
• SP (Super Protect) coating to keep the front surface free of dust and stains
• Detachable tripod mounting with a newly designed antifalling mechanism

* A state-of-the-art, PENTAX-original lens coating technology developed from nanotechnology. It applies a silica aerogel coating layer with uniform porous structure over a regular multi-coating layer to reduce surface reflections across a wide wavelength range and produce crisp, high-quality images.
** HD stands for High Definition.

This product is offered for sale under a selective distribution agreement.

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• Image circle covering Full-frame sensor
• 3X ratio supertelephoto zoom (eq to 230-690 for APS-C)
• Dependable weather-resistant construction against humidity and dust (21 protection joins)
• Smooth, quiet autofocus operation driven by a built-in DC motor
• HD Coating to optimize light transmittance and minimize reflection
• ED lens elements for brilliant sharpness and saturated colours
• Focus Range Limiter (Full, 2-6m, 6m-8)
• Round shaped diaphragm to produce beautiful bokeh
• Super Protect coating of the front lens element for effective protection
• Three-position switch for Quick-Shift Focus System (QFS/A, QFS/M and MF modes) for a speedier and more accurate focusing operation for a given subject or application
• Detachable tripod mounting with a newly designed anti-falling mechanism
• 4 AF buttons to provide more stable AF operation and better hold of the lens in horizontal or vertical position. These buttons are customizable (Focus Preset mode and AF cancel mode)
• Zoom lock lever to prevent the lens barrel from free-falling

1. Super-telephoto coverage with three-times zoom ratio When mounted on a PETAX K-mount SLR camera body, this zoom lens covers a super-telephoto range from approximately 230mm to 690mm in the 35mm format. It is designed to be compact and light enough to handhold during long-range shooting of such subjects as wildlife, aircraft and sports.

2. Outstanding image description Thanks to its state-of-the-art optics featuring three ED (Extra-low Dispersion) glass elements and one superlow dispersion glass element, this zoom lens effectively minimizes spherical and chromatic aberrations, while producing crisp, high-quality images free of color bleeding. Its MTF (Modulation Transfer Function) curve is programmed to be higher than those of conventional models in the same class to deliver high-resolution, fine detailed images. Its image circle is optimized to cover even the image size of 35mm film-format SLR cameras. As the result, it not only assures brilliant, high-resolution images without compromising the sharpness at edges even when mounted on an existing PENTAX digital SLR camera body, but it is also capable of accepting future models with larger image sensors without modifications.

3. HD Coating to optimize image rendition This lens is treated with the high-grade, multi-layer HD Coating.* Compared with conventional multi-layer coatings, this PENTAX-original coating assures higher light transmittance and less reflection to deliver bright, highcontrast images free of flare and ghost images, even under demanding lighting conditions such as backlight.

4. 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.

5. Newly installed three-position switch for Quick- Shift Focus System The lens is equipped with the PENTAX-developed Quick- Shift Focus System, which allows the user to instantly switch to manual-focus operation after the subject is captured in focus by the camera’s AF 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.

6. 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. ** The PETANX K-3 is currently the only model to accommodate the AF button functions. To activate these functions, the camera’s firmware must be updated to the latest version.

7. 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 minimising the streaking effect of point light sources
Focus range limiter to minimise 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.

The post Pentax 150-450mm f4.5-5.6 ED DC AW D-FA HD appeared first on York Camera Mart.