|The HD PENTAX-D FA★ 50mm F1.4 SDM AW is first model of the new generation of Star-series lenses. This single-focus standard lens with a 50mm focal length, something familiar to nearly every photographer, delivers the highest image quality possible in AF-compatible, single-focus standard lenses. The HD PENTAX-D FA★ 50mm F1.4 SDM AW symbolises the remarkable imaging power of the new-generation Star series. It has been designed to optimize the performance of the image sensor installed in the PENTAX K series of 35mm full-frame digital SLR cameras by greatly improving resolving power. It also delivers exceptional resolution and color reproduction even at open aperture, enhancing the image quality assured by the camera’s Pixel Shift Resolution System. The HD PENTAX-D FA★ 50mm F1.4 SDM AW is a large-aperture, single-focus standard lens with a maximum aperture of F1.4, which ensures the highest image quality of all lenses designed for use with K-mount digital SLR cameras.|
A large-aperture, single-focus lens designed for use with 35mm full-frame digital SLR cameras, including an array of PENTAX’s ever-evolving optical technologies
This large-aperture, single-focus standard lens is the newest model in the acclaimed PENTAX Star (★) series — the lineup boasting the best imaging performance of all PENTAX lenses for use with K-mount digital SLR cameras. The lens delivers the superb imaging power demanded of a new-generation, high-performance Star-series lens, assuring exceptional resolving power from the center to the edges of the image field, even when set to open aperture. Thanks to PENTAX-original lens coating technologies — including the latest 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. Its dustproof, weather-resistant body also makes it extremely dependable and durable for shooting in demanding outdoor conditions.
This lens features a KAF4 lens mount compatible with an electromagnetic diaphragm control system. Cameras compatible with this system are K-1 Mark II, K-1, K-3 II, KP, K-70, K-3, K-S2, K-S1 and K-50. For K-1, K-3 II, K-3, K-S2, K-S1 and K-50, the camera’s firmware must be upgraded to the latest version. If this lens is mounted on a camera without proper firmware upgrade, its diaphragm control mechanism becomes inactive, making it impossible to obtain correct exposure.
Exceptional resolving power even at F1.4 open aperture, with effective reduction of aberrations; outstanding versatility with all types of subjects, with reproduction of a natural bokeh effect
In addition to a modified gauss-type rear focus-lens group, the lens also features a group of aberration-correction elements in its front optical group, which effectively compensate for aberrations which cannot be corrected by a modified gauss-type group. The lens therefore assures uniform resolving power and excellent color reproduction from the center to the edges of the image field. Its minimum focusing distance has been reduced to a mere 40 centimeters. By incorporating a powerful, high-torque ring-type ultrasonic wave motor SDM, it also shifts the heavy rear optical group more efficiently and smoothly, for responsive, high-speed autofocus operation.
This lens has been developed as a new-generation member of the high-performance Star series — a lineup designed to deliver extra-clear, high-contrast images with edge-to-edge sharpness by compensating various aberrations to a minimum. After conducting an extensive review of the Star-series standards, PENTAX has designed this lens to assure greatly improved resolving power, looking ahead to its use with more advanced, next-generation camera bodies. It provides exceptionally high imaging performance even at open aperture, in addition to a beautiful bokeh (defocus) effect and an outstanding image rendition at close ranges. Developed as the first model of the new-generation Star-series lenses, this large-aperture: standard lens boasts an extra-large F1.4 maximum aperture, useful with many different subjects in a range of applications, including portraiture with an effectively defocused background, and handheld shooting of indoor scenes.
The lens is treated with PENTAX-developed Aero Bright Coating II* — a lens-coating nanotechnology employing a super-low refractive film fabrication process. By coupling this advanced lens coating with the high-grade, multi-layer HD Coating** — which reduces average reflectance in the visible ray spectrum to less than 50% of conventional multi-layer coatings — this lens effectively reduces flare and ghost images to a minimum even in demanding lighting conditions such as backlighting. By incorporating three super-low dispersion glass elements and one aspherical element in its optics, it effectively compensates chromatic and spherical aberrations, and produces brilliant, high-contrast images with edge-to-edge sharpness. Since it minimizes distortion even at a focusing distance of approximately one meter, it produces crisp, distortion-free images over the entire focusing range, from the minimum focusing distance to infinity.
*A state-of-the-art, PENTAX-original lens coating technology developed from nanotechnology. It applies a silica aerogel layer with a 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.
Developed as an AW (All Weather) model, this lens features a dependable dustproof, weather-resistant structure with eight special seals to prevent the intrusion of water and dust into the lens interior. When paired with a PENTAX weather-resistant digital SLR camera body, it forms 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.
This lens features a newly developed ring-type SDM (Supersonic Direct-drive Motor), which generates as much as 7.5 times the torque of the conventional SDM installed in existing lenses. Thanks to this enormous driving power, the lens assures a smooth, high-speed shift of the heavy, multi-element rear lens group during focusing operation.
Even at open aperture, the lens optimizes the subject’s beauty and elegance with sharply focused eye areas and fresh, lively skin tones. The natural bokeh effect is another distinguishing feature of this lens.
Thanks to a minimum focusing distance of just 40 centimeters, the lens has the versatility for use in a wide range of subjects and scenes, including the photography of flowers and table settings.
Since the lens de-emphasizes the edges of the light source, it creates a natural, true-to-life bokeh effect. It also prevents vignetting from affecting the defocused peripheral areas of the image field, allowing you to emphasize the bokeh effect in the resulting image.
State-of-the-art coating technology
The lens is treated with PENTAX-developed Aero Bright Coating II — a lens-coating nanotechnology employing a super-low refractive film fabrication process.
By coupling this advanced lens coating with the high-grade, multi-layer HD Coating, which reduces average reflectance in the visible ray spectrum to less than 50% of conventional multi-layer coatings, the lens effectively reduces flare and ghost images to a minimum, even in demanding lighting conditions such as backlighting.
Imaging performance at any time, and in all shooting conditions
Developed as an All Weather (AW) model, the lens features a dependable dustproof, weather-resistant structure with eight special seals to prevent the intrusion of water and dust into the lens interior. When paired with a PENTAX dustproof, weather-resistant digital SLR camera body, it forms 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. It also responds to the exacting demands of professional photographers: its focus ring is ideally shaped to assure firm hold and error-free focusing operation even with a wet or gloved hand; it provides dependable operation at a temperature from -10°C to 40°C; and it features the high-rigidity lens barrel structure required for field photography.
In order to shift the heavy, rear focus-lens group more smoothly and efficiently during focusing operation, the lens features a newly developed ring-type ultrasonic wave motor SDM, which generates as much as 7.5 times the torque of the compact SDM installed in existing DA★-series lenses. Thanks to this enormous driving power, the lens assures high-speed, high-precision autofocus operation. Because of minimal backlash of the focus ring, it also provides responsive manual-focus operation.
The lens barrel has been designed for a superior appearance. It features a panel line accentuated with the leveled construction of parts, and a uniformly designed body line all the way to the exclusive flower-shaped lens hood. Including the gold line symbolic of the Star-series lens and the familiar deep-green ring — a trademark of PENTAX interchangeable lenses — the lens is in keeping with a design concept standardized for both color scheme and parts positioning. This design concept will be applied to future Star-series lenses, as a reminder of the consistency and dependability of the PENTAX Star series.
1. Nine-blade, round-shaped diaphragm to produce a natural, beautiful bokeh (defocus) effect up to F2.8 aperture: setting, while minimizing the streaking effect of point light sources
2. A minimum focusing distance of 40 centimeters, effective in capturing images with a defocus effect
3. Electromagnetic diaphragm-control mechanism,* for flawless, high-precision exposure control during movie recording
4. SP (Super Protect) coating to keep the front surface free of dust and spots
* This mechanism is available when the lens is mounted on a K-1 Mark II, K-1, K-3 II, KP, K-70, K-3, K-S2 or K-S1, K-50 camera body.
Equivalent to 76.5mm in 35mm format (when attached to PENTAX APS-C size DSLR cameras)
|Lens Construction||15 elements in 9 groups|
|Angle of View (Diagonal)||47.0°
31.5°(when attached to PENTAX APS-C size DSLR cameras)
|Minimum Focusing Distance||0.4m (1.3ft.)|
|Diaphragm Control||Electromagnetic diaphragm
|Number of Diaphragm Blades||9
Rounded diaphragm （50mm:F1.4-F2.8）
|Lens Hood||PH-RBB72 (included)|
|Lens Cap||O-LC72 (included)|
|Lens Case||S100-140 (included)|
|Maximum Diameter x Length||approx. 80mm x 106mm (approx. 3.1in. x 4.2in.)|
|Weight||approx. 910g / with hood approx. 955g
(approx. 32.1 oz./ with hood approx. 33.7oz.)
|Humidity||85% or less (no condensation)|
|Included Accessories||Lens Hood PH-RBB72, Lens Cap O-LC72,
Lens Mount Cap K,Lens Case S100-140
Aero Bright Coating II
SP (Super Protect) Coating
AW (All Weather Resistant)
Quick-shift Focus System (QFS/M)
SDM (Ultrasonic Motor)
Whats in the box?
HD PENTAX-D FA★ 50mm F1.4 SDM AW Lens
Lens Hood PH-RBB72
Lens Cap O-LC72
Lens Mount Cap K
Lens Case S100-140