smc PENTAX-FA 50mmF1.4 Classic

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. 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.

 

Simulated ghost images in backlight*

 

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.

 

SP Coating

Water- and grease-repellent SP (Super Protect) Coating has been applied to the front surface of the lens, making it easier for the user to wipe off water or stains.

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】

Geometric optics MTF (MTF calculated without referencing the effects of light diffraction phenomenon)

F1.4

F4

F8

 

Wave optical MTF (MTF calculated referencing the effects of light diffraction phenomenon)

F1.4

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.

 

 

 

 

smc PENTAX-FA 50mmF1.4 Classic
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 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 x Length approx. 65mm x 37mm (approx. 2.6in. x 1.5in.)
Weight approx. 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

Compatible Converters

A1.4X-S, A2X-S, HD PENTAX-DA AF REAR CONVERTER 1.4x AW*

* The maximum aperture is set at F2.4
* When mounted on K-1 series, the image size is automatically cropped to the APS-C size.
* Please apply the latest updater of Digital Camera Utility 5 when you handle images taken by this lens on Digital Camera Utility 5. In case the software version is old, the name of this lens can not be displayed correctly. Digital Utility 4 and below can not display the name of this lens correctly.