Pentax HD D FA 50mm f/1.4 SDM AW Lens

(Save: $300.00)

  • Mfr SKU: 21260
  • K-Mount Lens/Full-Frame Format
  • Rounded 9-blade Diaphragm
  • Aperture Range: f/1.4 to f/16
  • Aero Bright Coating II & HD Coating
  • 1 Aspherical Element
  • Anomalous Dispersion Asph. Element
  • Ultrasonic Motor SDM
  • Front Element SP Coating
  • Weather Sealed

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Mfr SKU: 21260


The HD PENTAX-D FA50mm F1.4 SDM AW lens delivers exceptional resolving power from the center to the edges of the image field, even when set to open aperture. It incorporates state-of-the-art PENTAX-developed lens coating technologies — including the new Aero Bright Coating II for exceptionally low reflectance and high-grade high-definition (HD) Coating — that enable it to 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. Its PENTAX K-mount covers the image circle of a 35mm-format full-frame image sensor.  This large-aperture, prime lens delivers stellar imaging performance and maximum light transmission—the hallmarks of the acclaimed Star series line—and is the perfect companion to any K-mount digital SLR camera.

High-performance, next-generation lens with large F1.4 maximum aperture

The HD PENTAX-D FA* 50mm F1.4 SDM AW was developed as part of the new next-generation Star series, delivering high image resolving power.   It assures exceptional imaging performance from the center to the edges of the image field, even at open aperture, while providing a beautiful bokeh effect and outstanding image rendition at close ranges.  Its large maximum aperture of F1.4 delivers bright, clear images in portraiture and indoor photography, making it versatile in capturing a wide array of subjects and scenes.

State-of-the-art optical technology

The lens has been 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.

Dustproof, weather-resistant construction

Developed as an All Weather (AW) model, this lens features a dependable dustproof, weather-resistant structure with eight special seals to prevent the intrusion of water and dust in 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 outdoor shooting settings.

Newly developed ring-type ultrasonic motor SDM

The lens features a newly developed ring-type ultrasonic motor SDM, which generates almost twice the torque of a conventional lens-driving motor.  Thanks to this enormous driving power, the lens assures smooth, high-speed shifting of the heavy, multi-element rear lens group during focusing operation.

Rounded Diaphragm

Nine-blade rounded diaphragm to produce a natural bokeh (defocus) effect at up to F2.8 aperture setting, while minimizing the streaking effect of point light sources.

Quick-Shift Focus System

Allows for instant switching from auto-focus to manual-focus operation.

SP Coating

SP (Super Protect) Coating applied to the front surface of the lens to effectively repel water and grease

Focal Length

50 Comparable APS-C Focal Length: 76.5 mm


Maximum: f/1.4 Minimum: f/16

Camera Mount Type

Pentax K

Format Compatibility

35mm Film / Full-Frame Digital Sensor

Angle of View


Minimum Focus Distance

1.3′ / 39.62 cm



Maximum Reproduction Ratio

Not Specified by Manufacturer

Optical Design

15 Elements in 9 Groups

Diaphragm Blades

9, Rounded

Image Stabilization




Filter Thread

Front: 72 mm

Dimensions (DxL)

Approx. 3.15 x 4.17″ / 80 x 106 mm


32.1 oz / 910 g


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