Pentax 50mm f1.4 SDM AW FA* Prime Lens

PentaxSKU: 027075299719

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Sale price£999.00 Regular price£1,179.00

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Product Description

Pentax 50mm f1.4 SDM AW FA* Prime Lens

  • Large F1.4 maximum aperture
  • State-of-the-art optical technology
  • Dustproof, weather-resistant construction
  • Newly developed ring-type SDM (Supersonic Direct-Drive Motor)

The FA 50mm f/1.4 SDM AW Lens from Pentax is a remarkable piece of equipment, part of the company's Star Series of lenses. This standard length prime lens boasts a bright maximum aperture that enables accurate low-light shooting and provides a wide range of depth of field control. It is designed for full-frame Pentax K-mount cameras, but it can also be used on APS-C format cameras, where it provides a 76.5mm focal length.

The lens features Aero Bright Coating II and HD Coating on the 15 lens elements, which reduces flare and ghosting even when shooting in harsh lighting. Additionally, a front element SP Coating repels water and fingerprints from affecting the front of your lens. The autofocus is powered by Pentax's Ultrasonic Motor SDM, providing fast and accurate focus while shooting. The rounded 9-blade diaphragm produces smooth bokeh for portraits or other types of shots.



This lens is also weather-sealed, ensuring consistent performance during adverse outdoor shooting conditions. The Ultrasonic Motor SDM enables smooth and speedy autofocus, while the Aero Bright Coating combined with HD Coating on lens elements reduces ghosting and flare in extreme lighting situations. The SP Coating on the front lens element repels water and grease, making it easy to clean and maintain. The rounded, 9-blade diaphragm creates smooth and creamy bokeh, adding a professional touch to your shots.



In conclusion, the FA 50mm f/1.4 SDM AW Lens from Pentax is a must-have for any photographer looking to capture stunning images in low-light conditions. Its weather-resistant design and advanced coatings make it a reliable and durable lens that can withstand harsh outdoor conditions. The Ultrasonic Motor SDM ensures fast and accurate autofocus, while the rounded 9-blade diaphragm produces smooth and creamy bokeh, making it perfect for portraits and other types of shots.

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Focal Length 50mm
Equivalent to 76.5mm in 35mm format (when attached to PENTAX APS-C size DSLR cameras)
Maximum Aperture F1.4
Minimum Aperture F16
Lens Construction 15 elements in 9 groups
Angle of View (Diagonal) 47°(when attached to PENTAX 35mm full-frame SLR cameras)
31.5°(when attached to PENTAX APS-C size DSLR cameras)
Mount KAF4
Minimum Focusing Distance 0.4m (1.3ft.)
Maximum Magnification 0.18x
Filter Diameter 72mm
Diaphragm Control Electromagnetic diaphragm
Fully automatic
Number of Diaphragm Blades 9
Rounded diaphragm (50mm:F1.4-F2.8)
Aperture: Ring N/A
Tripod Mount N/A
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.)
Temperature -10°C~40°C (14°F~104°F)
Humidity 85% or less (no condensation)
Included Accessories Lens Hood PH-RBB72, Lens Cap O-LC72,
Lens Mount Cap K,Lens Case S100-140
Others HD Coating
Aero Bright Coating II
SP (Super Protect) Coating
AW (All Weather Resistant)
Quick-shift Focus System (QFS/M)
SDM (Ultrasonic Motor)

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Understanding: Aperture

Aperture is the opening in a camera lens that controls how much light enters the camera. It's measured in f-stops like f/2.8 or f/8. Lower f-stop numbers mean wider openings, letting in more light and creating a shallow depth of field (blurry background). Higher f-stop numbers mean smaller openings, letting in less light and creating a larger depth of field (more of the scene in focus). Aperture also affects the quality of out-of-focus areas in the image (bokeh).

Understanding: Lens Types

Different lenses have different purposes to achieve different styles of images, some popular ones include:
Prime Lens: Fixed focal length, sharp images, great for portraits and dark settings.
Zoom Lens: Variable focal length, versatile for different shots and everyday use..
Wide-Angle Lens: Captures wide scenes like landscapes.
Telephoto Lens: Magnifies distant subjects, ideal for sports & wildlife.
Macro Lens: Perfect for close-up photography of small subjects.
Fisheye Lens: Ultra-wide perspective, creates unique images.

Understanding: Lens Mounts

Different camera brands use different lens mounts, which are like connectors that attach lenses to camera bodies. Each mount is specific to a particular brand and camera series. For example, Canon uses the EF and RF mounts, Nikon uses the F mount, Sony uses the E mount for its mirrorless cameras. These mounts dictate which lenses are compatible with which cameras. Some brands offer adapters to use lenses from other systems, but it's essential to ensure compatibility for proper functionality and autofocus performance.

Understanding: Manual and Autofocus

Manual focus and autofocus are two ways to adjust the sharpness of a camera lens. With manual focus, you turn a ring on the lens to bring the subject into focus yourself, giving you full control over what appears sharp in the image. Autofocus, on the other hand, relies on the camera's built-in technology to automatically adjust the focus for you, usually by detecting contrast or phase differences in the scene. Autofocus can be convenient, especially for fast-moving subjects or when you need to capture a quick shot, whereas manual focus allows for precise adjustments and creative control over the final image.

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