smc PENTAX-FA 50mmF1.4 Classic

Name: smc PENTAX-FA 50mmF1.4 Classic
Brand: Ricoh Imaging
SKU: 20800
Price: 419.95 USD
Availability: InStock

A standard lens, providing unique image rendition resembling that of an old-time lens

This single-focus standard lens has been designed to provide a unique image rendition — rainbow flare in particular — resembling that of a lens designed more than 50 years ago.

Model No: 20800

Genuine PENTAX Product

In Stock

Official Warranty

Price

$419.95

Designed as an interchangeable lens for use with PENTAX K-mount digital SLR cameras, its larger-diameter optics cover the full-frame image circle of K-mount cameras, despite its compact dimensions.

When mounted on a PENTAX digital SLR camera body, it can be used as a 50mm standard lens in the full-frame format, or a 76.5mm medium-telephoto lens in the APS-C format. With a full-frame camera, it provides an angle of view close to that of the human visual field, making it an ideal choice for a wide range of applications, such as snapshots, scenic images and portraiture.

Included Accessories : Lens Filter LF-ND16 49mm, Lens Cap O-LC49, Lens Mount Cap K

Features / Specifications

Distinctive imaging characteristics

Through intentional fine-tuning of the lens design, this lens has been designed to produce a unique visual effect commonly known as rainbow flare when an image is captured at open aperture* and against strong backlight.** It lets the photographer change the position and size of the rainbow flare by shifting the relative position of the subject and light source, creating this unique visual expression not available with the latest lenses. By closing the aperture down to F4 or smaller, the photographer can also capture sharper, crisper images with minimal flare and ghost images.

* It may be difficult to create rainbow flare when the lens is mounted on an APS-C-format digital SLR camera, because the camera’s image sensor is designed to use only the central area of the image circle.

** During shooting, the user is advised to mount a Neutral Density (ND) filter (included as a standard accessory), or a commercial ND filter designed to reduce light transmittance in the lens to less than a 1/16 level, on the lens. When observing an image through the camera’s optical viewfinder, the user is advised to avoid looking directly at strong light sources.

Abstract abstract image with glowing orange and red circular light rings and reflections against a dark background — smc PENTAX-FA 50mmF1.4

Abstract image of glowing amber glass spheres arranged vertically against a dark background with soft reflections — smc PENTAX-FA 50mmF1.4 Classic

The lens coating on each optical element of the smc PENTAX-FA 50mm F1.4 Classic has been fine-tuned to minimize the generation of unwanted ghost images, while retaining those that are essential in producing its distinctive rendition.

* These images are at open aperture, and are simulated using the exclusive software.

Technical Specifications

Focal length / 35mm equivalent: 50mm
Equivalent to 76.5mm in 35mm format
(when attached to PENTAX APS-C size DSLR cameras)
Maximum aperture: F1.4
Minimum aperture: F22
Lens construction: 7 elements in 6 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: KAF
Minimum focusing distance: 0.45m (1.48ft.)
Maximum magnification: 0.15x
Filter diameter: 49mm
Diaphragm control: Fully automatic
Number of diaphragm blades: 8
Rounded diaphragm （50mm:F1.4-F2.8）
Aperture ring: Equipped
Tripod mount: N/A
Lens hood: RH-RC49, PH-RA49 (not included)
Lens cap: O-LC49 (included)
Lens case: S70-70 (not included)
Maximum diameter × length: approx. 65mm x 37mm (approx. 2.6in. x 1.5in.)
Weight: pprox. 216g (approx. 7.6oz.)
Temperature: -10°C～40°C (14°F～104°F)
Humidity: 85% or less (no condensation)
Included accessories: Lens Cap O-LC49, Lens Mount Cap K, Lens Filter LF-ND16
49mm
Others: SP (Super Protect) Coating

SP Coating

The front optical element has been treated with SP (Super Protect) Coating to keep the front surface free of dust or stains, improving imaging performance and reliability in outdoor settings.

Distinctive image rendition

Thanks to its large F1.4 open aperture, this lens captures images with a very shallow depth of field. Its eight-blade diaphragm control mechanism produces a soft, natural bokeh (defocus) effect from open aperture to F2.8, and also minimizes the streaking effect of point light sources.

Nostalgic design

This lens retains the exterior design of its base model — the smc PENTAX-FA50mm F1.4 — and features a black matte finish and a matte-black focus ring. It has no green ring — the symbolic design of recent PENTAX-brand lenses — to recreate the nostalgic appearance of interchangeable lenses designed for PENTAX Z-series film-format cameras.

Compatibility with older cameras

Thanks to the aperture ring installed on the lens body, and the coupling mechanism with the camera’s motor-driven, in-body AF system, this lens is designed to be fully compatible with older K-mount digital SLR cameras and film-format AF SLR cameras, allowing the photographer to retain all camera functions of these models.

MTF chart showing solid and dashed blue and red lines across focal length from 0 to 22 millimeters — F1.4

MTF chart comparing solid and dashed blue and red curves from 0 to 22 millimeters, with percentage gridlines — F4

MTF chart comparing solid and dashed S:10, M:10, S:30, and M:30 curves across image height, with 50mm label — F8

Line chart showing MTF percentage curves for S:10, M:10, S:30, and M:30 across 0 to 22 millimeters — Wave optical MTF (MTF calculated referencing the effects of light diffraction phenomenon)

Since it is impossible to avoid light diffraction phenomenon on the actual lens, wave optical MTF is more realistic.
However, geometric MTF is appropriate if you want to compare only the effects of geometric aberration correction on MTF.