Pentax KF

APS-C AF digital SLR camera

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Specification

Production details
Announced:November 2022
System: Pentax K APS-C (2003)
Imaging plane
Maximum format:APS-C
Mount and Flange focal distance:Pentax K [45.5mm]
Imaging plane:23.5 × 15.6mm CMOS sensor
Resolution:6000 × 4000 - 24 MP
Shutter
Type:Focal-plane
Model:Electronically controlled
Speeds:30 - 1/6000 + B
Sensor-shift image stabilization:Yes
Exposure
Exposure metering:Through-the-lens (TTL), open-aperture
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Physical characteristics
Weight:625g
Dimensions:125.5x93x74mm

Manufacturer description

TOKYO, November 10, 2022-RICOH IMAGING COMPANY, LTD. is pleased to announce the launch of the PENTAX KF digital SLR camera. The compact, dustproof and weather-resistant body of this standard-class model, designed for all types of outdoor photography, provides a host of advanced, user-friendly features including an optical viewfinder.

Redefining the essential values of SLR photography, the PENTAX KF is designed to provide outstanding imaging performance in a compact body. It features a dustproof, weather-resistant construction and provides dependable cold-proof performance down to temperatures as low as -10°C, performing superbly in a wide range of outdoor photography without being affected by weather conditions. Despite being in the standard class, it incorporates an array of advanced functions and user-friendly features which are usually available only in upper-class models -- such as a pentaprism-type optical viewfinder with a nearly 100% field of view and an in-body shake-reduction system with a 4.5 shutter-step compensation. With the PENTAX KF, even first-time SLR users can easily and effortlessly enjoy full-scale SLR photography and the entire process of digital imaging.

Two special-edition color models -- crystal blue and crystal white -- will be marketed worldwide in a limited quantity of 700 units each.

Main features of the PENTAX KF

1. Super-high-resolution images captured with approximately 24.24 effective megapixels and at ISO 102400

The PENTAX KF assures super-high-resolution imaging, thanks to a state-of-the-art CMOS image sensor with approximately 24.24 effective megapixels and high-speed 14-bit image data readout. Combined with an AA-filter-free optical design, this image sensor delivers super-high-resolution images. Also, by coupling a high-performance accelerator unit with the high-speed PRIME MII imaging engine, the PENTAX KF effectively minimizes noise at all sensitivity levels and captures rich-gradation, fine-detailed images even in super-high-sensitivity shooting at a top sensitivity of ISO 102400.

2. Dustproof, weather-resistant body perfect for rugged outdoor photography

The PENTAX KF is a dependable performer even in such demanding settings as in the rain or at locations prone to dust and freezing temperatures, because it combines a compact, easy-to-carry body with a dustproof, weather-resistant construction featuring 100 seals throughout the body and outstanding cold-proof performance at temperatures down to -10°C. To assure a firm hold of the camera body with a gloved hand, the grip, control buttons on the back panel and mode dials have all been designed and contoured for optimum operability in active outdoor shooting -- such as when mountain climbing, camping or attending sporting events. In addition to its outdoor-friendly LCD monitor, whose brightness level can be instantly adjusted to the lighting level of a shooting location, it also features a red-lighted monitor display function, which works friendly to the photographer's eye when it has become accustomed to a dark location during astronomical photography.

3. Clear-view optical viewfinder

Within its compact body, the PENTAX KF incorporates a glass prism finder featuring the same optics and coatings as those used in higher-level models. With its approximately 100% field of view and nearly 0.95-times magnification, the PENTAX KF's viewfinder provides a large, clear view of the subject for quick, easy confirmation of focusing and framing. It also provides a double e-dial system identical with upper-class models, and PENTAX-original shooting features, such as the Hyper Program system which allows the user to instantly switch the exposure mode from Program to Aperture-priority or Shutter-priority without taking the eye off the viewfinder.

4. Vari-angle LCD monitor for easy image viewing from all angles

The PENTAX KF's vari-angle LCD monitor allows the monitor to be positioned at the desired angle, making it easier to compose images in a wide variety of applications: high-angle shooting using outstretched arms, low-angle shots taken from ground level or astronomical photography with the camera pointed upwards toward a star-filled sky. It also features a unique air-gapless construction, in which the air space between the high-definition LCD panel (with approximately 1,037,000 dots) and the protective cover has been filled with a special resin material to effectively reduce the reflection and dispersion of light for improved visibility during outdoor shooting.

5. PENTAX-original shake-reduction system featuring the Pixel Shift Resolution System

(1) In-body SR mechanism

Thanks to the built-in PENTAX-original SR (Shake Reduction) mechanism, the PENTAX KF effectively minimizes camera shake and delivers sharp, blur-free images, even in camera-shake-prone conditions such as when using a telephoto lens, shooting low-light scenes with incident light only, or photographing sunset scenes. Using a high-accuracy gyro sensor, it provides a compensation effect of 4.5 shutter steps, a level close to that of upper-class models. When taking a panning shot, this mechanism automatically detects the direction of the camera's movement, and efficiently controls the SR unit to produce the best image possible without requiring any mode switching operation.

(2) Pixel Shift Resolution System with motion correction function

The PENTAX KF features the latest super-resolution technology called Pixel Shift Resolution System,* which captures four images of the same scene by shifting the image sensor by a single pixel for each image, then synthesizes them into a single composite image. Compared to the conventional Bayer system, in which each pixel has only a single color data unit, this innovative system obtains all color data in each pixel to deliver super-high-resolution images with far more truthful colors and much finer details than those produced by conventional APS-C-size image sensors. This system even provides a motion correction function,** which automatically detects a moving object during continuous shooting and minimizes negative effects during the synthesizing process, in order to accommodate a wider range of scenes and subjects.

(3) Innovative AA filter simulator to minimize moiré

By applying microscopic vibrations to the image sensor unit at the sub-pixel level during image exposure, the PENTAX KF's AA (anti-aliasing) filter simulator*** provides the same level of moiré reduction as an optical AA filter. Unlike an optical AA filter, which always creates the identical result, this innovative simulator lets the user switch the AA filter effect on and off, and adjust the level of the effect. This means that the ideal effect can be set for a particular scene or subject based on the current photographic conditions.

(4) Supportive shooting functions

Since the PENTAX KF's image sensor unit is designed to tilt in all directions, it provides a host of handy shooting functions, including: ASTROTRACER, which simplifies advanced astronomical photography in combination with the optional O-GPS2 GPS Unit; and the Auto Horizon Correction and Extra Sharpness functions.

* When using this system, the user is advised to stabilize the camera firmly on a tripod. When a moving subject is captured in the camera's image field, its image may not be reproduced clearly, either in part or as a whole.

** The movement may not be sufficiently corrected when the object is moving in a certain direction and/or pattern. This function does not guarantee that the movement is properly corrected with all subjects.

*** This function works most effectively with a shutter speed of 1/1000 second or slower. This function may not be combined with some shooting modes, including the Pixel Shift Resolution system.

6. Hybrid AF system for high-speed AF operation during Live View shooting

The PENTAX KF employs the Hybrid AF system during Live View autofocus operation. By positioning a contrast-detection AF sensor with superior focusing accuracy and a phase-matching AF sensor on the image sensor's surface, this innovative hybrid system optimizes the benefits of both AF systems to assure high-speed, pinpoint AF focusing on the subject.

7. High-precision autofocus system with the SAFOX X module

The PENTAX KF features the high-precision SAFOX X AF sensor module, which assures responsive, dependable autofocus operation. With its 11 sensors including nine cross-type sensors in the middle, this AF module assures pinpoint focus on the subject at a minimum brightness level as low as -3 EV. It also assures outstanding AF tracking performance with subjects on the move, thanks to such advanced features as the Select-area Expansion function, which automatically refocuses on a moving subject after it moves away from the initial point, with the help of the neighboring points; and an AF Hold function that maintains the initial in-focus point even when the module loses sight of the subject.

8. An array of image processing functions for diversified photographic expression

The PENTAX KF provides the PENTAX-developed Custom Image function, which lets the user process an image with the desired finishing touch to express the creative intention, or to suit the particular scene. This function provides 14 Custom Image modes, including: SATOBI, which reproduces the colors resembling those of color pictures in the 60s and 70s, with cyan-tinged blues, subdued yellows and faded reds; Bleach Bypass, which recreates the profound atmosphere of movie scenes; and Cross Processing, which adds fantastic, unusual colors to captured images. In combination with PENTAX Limited-series lenses, which are popular for their distinctive image renditions, the PENTAX KF also provides a series of special-edition Custom Image modes.

9. A host of interval shooting functions

The PENTAX KF provides a host of advanced interval shooting functions, including: 4K-resolution Interval Movie, which lets you record a series of still images at a fixed interval and link them into a single 4K-resolution movie file; Star Stream Movie, which lets you record the traces of stars or illuminations on a 4K-resolution movie file; and Interval Composite, which synthesizes a composite image with a choice of three synthesis modes (average, additive and comparative).

10. Wireless LAN connection to support smartphone operation

The PENTAX KF provides a host of wireless LAN (Wi-Fi) functions to support operations using smartphones and tablet computers. By installing the dedicated Image Sync application in a mobile device, the user can remotely check the Live View image, capture still images, and adjust such camera settings as aperture, shutter speed and ISO sensitivity to the desired level through the mobile device. It is even possible to download captured images onto the mobile device, then upload them on social networking service websites.

11. Other features

  • 77-segment multi-pattern metering system for high-precision light metering
  • DR (Dust Removal) mechanism to shake dust off from the surface of the CMOS image sensor
  • High-speed shutter unit with a top speed of 1/6000 second, and high-speed continuous shooting function at a top speed of approximately six images per second
  • Self-timer function, compatible with the continuous shooting function
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Copyright © 2012-2023 Evgenii Artemov. All rights reserved. Translation and/or reproduction of website materials in any form, including the Internet, is prohibited without the express written permission of the website owner.

35mm full frame

43.27 24 36
  • Dimensions: 36 × 24mm
  • Aspect ratio: 3:2
  • Diagonal: 43.27mm
  • Area: 864mm2

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Image stabilizer

A technology used for reducing or even eliminating the effects of camera shake. Gyro sensors inside the lens detect camera shake and pass the data to a microcomputer. Then an image stabilization group of elements controlled by the microcomputer moves inside the lens and compensates camera shake in order to keep the image static on the imaging sensor or film.

The technology allows to increase the shutter speed by several stops and shoot handheld in such lighting conditions and at such focal lengths where without image stabilizer you have to use tripod, decrease the shutter speed and/or increase the ISO setting which can lead to blurry and noisy images.

Original name

Lens name as indicated on the lens barrel (usually on the front ring). With lenses from film era, may vary slightly from batch to batch.

Format

Format refers to the shape and size of film or image sensor.

35mm is the common name of the 36x24mm film format or image sensor format. It has an aspect ratio of 3:2, and a diagonal measurement of approximately 43mm. The name originates with the total width of the 135 film which was the primary medium of the format prior to the invention of the full frame digital SLR. Historically the 35mm format was sometimes called small format to distinguish it from the medium and large formats.

APS-C is an image sensor format approximately equivalent in size to the film negatives of 25.1x16.7mm with an aspect ratio of 3:2.

Medium format is a film format or image sensor format larger than 36x24mm (35mm) but smaller than 4x5in (large format).

Angle of view

Angle of view describes the angular extent of a given scene that is imaged by a camera. It is used interchangeably with the more general term field of view.

As the focal length changes, the angle of view also changes. The shorter the focal length (eg 18mm), the wider the angle of view. Conversely, the longer the focal length (eg 55mm), the smaller the angle of view.

A camera's angle of view depends not only on the lens, but also on the sensor. Imaging sensors are sometimes smaller than 35mm film frame, and this causes the lens to have a narrower angle of view than with 35mm film, by a certain factor for each sensor (called the crop factor).

This website does not use the angles of view provided by lens manufacturers, but calculates them automatically by the following formula: 114.6 * arctan (21.622 / CF * FL),

where:

CF – crop-factor of a sensor,
FL – focal length of a lens.

Mount

A lens mount is an interface — mechanical and often also electrical — between a camera body and a lens.

A lens mount may be a screw-threaded type, a bayonet-type, or a breech-lock type. Modern camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body, unlike screw-threaded mounts.

Lens mounts of competing manufacturers (Canon, Nikon, Pentax, Sony etc.) are always incompatible. In addition to the mechanical and electrical interface variations, the flange focal distance can also be different.

The flange focal distance (FFD) is the distance from the mechanical rear end surface of the lens mount to the focal plane.

Lens construction

Lens construction – a specific arrangement of elements and groups that make up the optical design, including type and size of elements, type of used materials etc.

Element - an individual piece of glass which makes up one component of a photographic lens. Photographic lenses are nearly always built up of multiple such elements.

Group – a cemented together pieces of glass which form a single unit or an individual piece of glass. The advantage is that there is no glass-air surfaces between cemented together pieces of glass, which reduces reflections.

Focal length

The focal length is the factor that determines the size of the image reproduced on the focal plane, picture angle which covers the area of the subject to be photographed, depth of field, etc.

Speed

The largest opening or stop at which a lens can be used is referred to as the speed of the lens. The larger the maximum aperture is, the faster the lens is considered to be. Lenses that offer a large maximum aperture are commonly referred to as fast lenses, and lenses with smaller maximum aperture are regarded as slow.

In low-light situations, having a wider maximum aperture means that you can shoot at a faster shutter speed or work at a lower ISO, or both.

Closest focusing distance

The minimum distance from the focal plane (film or sensor) to the subject where the lens is still able to focus.

Closest working distance

The distance from the front edge of the lens to the subject at the maximum magnification.

Magnification ratio

Determines how large the subject will appear in the final image. For example, a magnification ratio of 1:1 means that the image of the subject formed on the film or sensor will be the same size as the subject in real life. For this reason, a 1:1 ratio is often called "life-size".

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Electronic manual focus override is performed in the following way: half-press the shutter button, wait until the camera has finished the autofocusing and then focus manually without releasing the shutter button using the focusing ring.

Manual diaphragm

The diaphragm must be stopped down manually by rotating the detent aperture ring.

Preset diaphragm

The lens has two rings, one is for pre-setting, while the other is for normal diaphragm adjustment. The first ring must be set at the desired aperture, the second ring then should be fully opened for focusing, and turned back for stop down to the pre-set value.

Semi-automatic diaphragm

The lens features spring mechanism in the diaphragm, triggered by the shutter release, which stops down the diaphragm to the pre-set value. The spring needs to be reset manually after each exposure to re-open diaphragm to its maximum value.

Automatic diaphragm

The camera automatically closes the diaphragm down during the shutter operation. On completion of the exposure, the diaphragm re-opens to its maximum value.

Fixed diaphragm

The aperture setting is fixed at F/ on this lens, and cannot be adjusted.

Number of blades

As a general rule, the more blades that are used to create the aperture opening in the lens, the rounder the out-of-focus highlights will be.

Some lenses are designed with curved diaphragm blades, so the roundness of the aperture comes not from the number of blades, but from their shape. However, the fewer blades the diaphragm has, the more difficult it is to form a circle, regardless of rounded edges.

At maximum aperture, the opening will be circular regardless of the number of blades.

Weight

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

Maximum diameter x Length

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

For lenses with collapsible design, the length is indicated for the working (retracted) state.

Weather sealing

A rubber material which is inserted in between each externally exposed part (manual focus and zoom rings, buttons, switch panels etc.) to ensure it is properly sealed against dust and moisture.

Lenses that accept front mounted filters typically do not have gaskets behind the filter mount. It is recommended to use a filter for complete weather resistance when desired.

Fluorine coating

Helps keep lenses clean by reducing the possibility of dust and dirt adhering to the lens and by facilitating cleaning should the need arise. Applied to the outer surface of the front and/or rear lens elements over multi-coatings.

Filters

Lens filters are accessories that can protect lenses from dirt and damage, enhance colors, minimize glare and reflections, and add creative effects to images.

Lens hood

A lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background.

The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood.

Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens.

Lens hoods are often designed to fit onto the matching lens facing either forward, for normal use, or backwards, so that the hood may be stored with the lens without occupying much additional space. In addition, lens hoods can offer some degree of physical protection for the lens due to the hood extending farther than the lens itself.

Teleconverters

Teleconverters increase the effective focal length of lenses. They also usually maintain the closest focusing distance of lenses, thus increasing the magnification significantly. A lens combined with a teleconverter is normally smaller, lighter and cheaper than a "direct" telephoto lens of the same focal length and speed.

Teleconverters are a convenient way of enhancing telephoto capability, but it comes at a cost − reduced maximum aperture. Also, since teleconverters magnify every detail in the image, they logically also magnify residual aberrations of the lens.

Lens caps

Scratched lens surfaces can spoil the definition and contrast of even the finest lenses. Lens covers are the best and most inexpensive protection available against dust, moisture and abrasion. Safeguard lens elements - both front and rear - whenever the lens is not in use.