Pentax K-3 III

APS-C AF digital SLR camera

Specification

Production details
Announced:March 2021
System: Pentax K APS-C (2003)
Imaging plane
Maximum format:APS-C
Mount and Flange focal distance:Pentax K [45.5mm]
Imaging plane:23.3 × 15.5mm CMOS sensor
Resolution:6192 × 4128 - 26 MP
Shutter
Type:Focal-plane
Model:Electronically controlled
Speeds:30 - 1/8000 + 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:735g
Dimensions:134.5x103.5x73.5mm

Manufacturer description

PARSIPPANY, NJ, March 30, 2021 -Ricoh Imaging Americas Corporation today announced the PENTAX K-3 Mark III, the new flagship model in its APS-C format digital SLR camera series. Designed around the PENTAX Principles, the new camera offers advanced functions and outstanding imaging performance with a goal of optimizing the fun and excitement of photography in a wide variety of conditions.

The PENTAX K-3 Mark III builds on the PENTAX legacy of outstanding image quality, incorporating a back-illuminated CMOS image sensor with approximately 25.73 effective megapixels. By coupling this sensor with an AA (anti-aliasing)-filter-free optical design, the camera produces super-high-resolution images. A newly developed, high-performance PRIME V imaging engine and new-generation accelerator unit delivers well-defined images with minimal noise, while retaining high-resolution reproduction at all sensitivities. The PENTAX K-3 Mark III boasts a super-high sensitivity of ISO 1600000 and features a newly developed SAFOX 13 autofocus system with 101 focus sensors.

A new, super-bright optical viewfinder delivers a nearly 100% field of view and magnification of approximately 1.05 times. With a newly developed high-refraction glass prism, the viewfinder provides a wide field of view equivalent to that of a full-frame SLR, fully immersing the photographer in shooting.

The camera’s compact, rugged body is dustproof and weather resistant, making it suitable for use in the most extreme environmental conditions. It features PENTAX’s high-performance, five-axis shake-reduction (SR) system, minimizing camera shake to deliver sharp, blur-free images. Furthering its commitment to producing the highest quality images, the PENTAX K-3 Mark III features the innovative Pixel Shift Resolution System, employing advanced super-resolution technology to capture four images of the same scene by shifting the image sensor by a single pixel for each image, then synthesize them into a single composite image.

The PENTAX K-3 Mark III is equipped with user-friendly shooting functions, improved efficiency and operability. These include a high-definition 3.2-inch touch-screen LCD monitor—the first touch screen in the PENTAX K series. The screen allows intuitive operation of a variety of functions, including scrolling menu selection and image zooming during playback.

The camera also features PENTAX Real-time Scene Analysis System, supported by the latest artificial intelligence technology. It can instantly detect a subject’s face and eyes using advanced image recognition technology and makes a real-time analysis of the subject’s movement. The system assists the camera in optimizing exposure settings and improving autofocusing accuracy, assuring more accurate subject detection and more reliable scene judgment.

“The development of the PENTAX K-3 Mark III has been a longtime labor of love,” said Kaz Eguchi, president, Ricoh Imaging Americas Corporation. “At Ricoh, our goal is to develop high-quality cameras with the power to capture images that speak louder than words and inspire photographers to continue pursuing their passion for photography every day.”

Ricoh is also producing two limited-edition kits -- the PENTAX K-3 Mark III Black Premium Kit and PENTAX K-3 Mark III Silver Premium Kit. These special packages include a camera body and battery grip (the Silver Premium Kit comes with a silver camera body and a silver battery grip that is exclusive to this package), plus an exclusive leather strap and a spare battery. The specifications of the limited-edition models are identical to those of the PENTAX K-3 Mark III. The Premium Kits will be available in late April for the manufacturer’s suggested retail price of $2,299.95.

| The Five Principles of PENTAX |

  • We design new cameras through sheer devotion.
  • Our goal is to produce cameras with the power to capture images that allow for direct communication with the subject.
  • We design cameras that allow our users to enjoy all the processes involved in taking a picture.
  • We pursue a level of quality and performance that can’t be measured by numbers alone.
  • We respect and value the photographic experiences of our users and view this as an invaluable asset.

| Main features of the PENTAX K-3 Mark III |

1.Optical viewfinder with nearly 100% field of view and approximately 1.05-times magnification

The PENTAX K-3 Mark III features an optical viewfinder with a nearly 100-percent field of view and a magnification of approximately 1.05 times. A newly developed, high-refraction glass prism assures comfortable viewing with a wide field of view equivalent to that of a full-frame SLR. Also, by using a distortion-correcting optical element and optimizing the lens coatings, it delivers a clear, true-to-life viewfinder image free of distortion, with brightness improved by nearly 10 percent over the PENTAX K-3 II’s viewfinder. Incorporating a Natural Bright Matte III focusing screen — known for ease of focus during manual-focus shooting — it also delivers a sharp, clear subject image with faithful reproduction of the bokeh (defocus) effect. In addition, its transparent display lets the user monitor a wide range of operational data in the viewfinder window.

2.High-resolution images assured by approximately 25.73 effective megapixels and super-high-sensitivity photography at a top sensitivity of ISO 1600000

As part of its passion for higher image quality, PENTAX equipped the PENTAX K-3 Mark III with a back-illuminated CMOS image sensor with approximately 25.73 effective megapixels. By coupling this sensor with an AA (anti-aliasing)-filter-free optical design, the camera produces super-high-resolution images. PENTAX also renewed all key devices, including the newly developed, high-performance PRIME V imaging engine and new-generation accelerator unit to deliver well-defined images with minimal noise, while retaining high-resolution reproduction at all sensitivities — even in the super-low or super-high range. Also, by greatly improving the noise-reduction performance at high-sensitivity ranges, it boasts a top sensitivity of ISO 1600000 to extend the range of scenes that can be photographed.

3.Pentax SR II Shake Reduction System delivers high-performance, 5-Axis, 5.5-shutter-step camera shake compensation

(1) In-body SR mechanism, compatible with all mountable lenses*

The built-in SR II shake-reduction mechanism means that the PENTAX K-3 Mark III 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 without flash illumination, or photographing sunset scenes. In addition to horizontal and vertical camera shake caused by pitch and yaw, this five-axis mechanism compensates for camera shake caused by horizontal and vertical shift (often generated in macro photography) and camera shake caused by roll. It assures a compensation effect of approximately 5.5 shutter steps(CIPA standard compliant, HD PENTAX-DA 16-85mm F3.5-5.6ED DC WR、f = 85mm) — the highest level in PENTAX history — to expand the limits of handheld photography. This mechanism also provides a new Panning mode to capture sharp, clear images of slow-moving subjects.

(2) Pixel-Shift Resolution System

This innovative system 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 system obtains all color data in each pixel and delivers super-high-resolution images with more truthful colors and much finer details than those produced by the conventional system. To make this system more useful with a wider range of scenes and subjects, the camera provides ON/OFF switching of the Motion Correction function, which automatically detects only moving elements of the image during continuous shooting and minimizes negative effects during the synthesizing process.

(3) AA-filter simulator to minimize moiré and false color**

The PENTAX K-3 Mark III features an AA (anti-aliasing)-filter simulator, which effectively reduces moiré patterns to the same level as an optical AA filter, by applying microscopic vibrations to the image sensor at the sub-pixel-level during exposure. Unlike a conventional optical AA filer, this innovative, PENTAX-original simulator provides ON/FF switching and level selection to assure the optimal filter effect for a given subject or photographic condition.

4.High-definition LCD monitor with intuitive touch-screen control

The PENTAX K-3 Mark III features a high-definition, 3.2-inch LCD monitor with approximately 1,620,000 pixels. Incorporating touch-screen control for the first time in the PENTAX K series, this monitor provides intuitive operation of monitor functions, including menu selection and image zooming during playback. Its air-gapless construction, in which a special resin material is injected into the gap between LCD layers and a protective tempered-glass cover, effectively reduces reflections and the dispersion of light to improve visibility during outdoor shooting. The viewfinder eyepiece is designed to protrude away from the LCD monitor screen, so the user’s nose does not contact the camera body. Positioned at the bottom of the eyepiece is an eye sensor, which turns the monitor off the moment the photographer looks into the viewfinder, preventing monitor illumination from affecting visibility during shooting.

5.SAFOX 13 autofocus system with 101 focus sensors

The PENTAX K-3 Mark III features a newly developed SAFOX 13 phase-matching AF sensor module for dependable, high-precision autofocus operations. It has 101 focus sensors, 25 of which are cross-type sensors positioned in the middle, to assure pinpoint focus on the subject at minimum brightness levels as low as -4 EV.*** Also, by featuring a new, high-capacity RGBIr image sensor with approximately 307,000 pixels and a newly developed image-tracking algorithm, the camera also assures accurate tracking of subjects moving at varying speed or in irregular motion. A newly installed AF point selector lever allows the user to select the desired focus point more intuitively (up to 41 points).

6.PENTAX Real-time Scene Analysis System, supported by the latest artificial intelligence technology

Supported by the combination of the new, high-density RGBIr image sensor and the high-performance PRIME V imaging engine, the PENTAX Real-time Scene Analysis System instantly detects the subject’s face and eyes using the advanced image recognition technology, then makes real-time analysis of their movement. This assists the camera in optimizing exposure settings and improving autofocusing accuracy. By adopting Deep Learning**** — the latest, much-publicized artificial intelligence technology — the PENTAX K-3 Mark III assures more accurate subject detection and more reliable scene judgment.

7.High-speed continuous shooting at a top speed of approximately 12 images per second

Thanks to a newly developed mirror-driving mechanism assuring high-speed, high-accuracy control of the mirror and shutter mechanisms, and the high-performance PRIME V imaging engine that performs high-speed data transmission, the PENTAX K-3 Mark III provides high-speed drive continuous shooting — with a maximum speed of approximately 12 images per second in the AF.S mode, or approximately 11 images per second in the AF.C mode.

8.User-friendly shooting functions to improve shooting efficiency and operability

  • PENTAX-exclusive Hyper Operation system, featuring a new Advanced mode for more flexible exposure control.
  • Operation Control Lock function, to prevent accidental operational errors of exposure-setting buttons and the four-way controller.
  • New-generation Smart Function with the dedicated Smart Function button, for speedy selection and setting of various functions without the need of switching on-screen menus.
  • Button Customization function, to assign user-selected functions to 10 different control buttons.

9.Compact, sturdy body with dustproof, weather-resistant construction

The PENTAX K-3 Mark III’s top, bottom, front and rear panels are all made of lightweight, high-rigidity magnesium alloy. Coupled with a dustproof, weather-resistant construction with special seals applied to crucial parts of the camera body, and outstanding cold-resistant performance to ensure stable operation at -10°C, the camera is designed to be extremely durable and dependable even in harsh environmental conditions, such as when shooting in the rain, or at dust-prone or low-temperature locations. The camera also features a durable, dependable shutter unit — verified in an endurance test of 300,000 shutter-release actions — to perfect the rugged body for worry-free shooting at any location.

10.4K-resolution movie recording with a range of functional settings

The PENTAX K-3 Mark III captures 4K-resolution movie clips (3840 x 2160 pixels; 30p/24p frame rate) or Full HD movie clips (1920 x 1080 pixels; 60p/30p/24p frame rate) in the H-264 recording format. Equipped with a stereo microphone input terminal and headset terminal, it also allows the user to manually set the audio recording level and monitor the sound pressure level for microphone input. Thanks to quiet touch-screen control on the LCD monitor positioned on its back panel, the desired shooting function and exposure compensation level can be set without worrying about operational noise.

11.Bluetooth® and Wireless LAN connection

The PENTAX K-3 Mark III provides two wireless interface options — Bluetooth® and Wireless LAN — for connection with mobile devices, such as smartphones and tablets. By installing the dedicated Image Sync application in a mobile device, the user can view Live View images on a smartphone screen or capture images and change camera settings using the mobile device. This application also allows the user to transfer captured images to a mobile device and upload them to various SNS sites.

12.Other features

  • DR II (Dust Removal II) mechanism, for effective removal of dust particles using ultrasonic vibrations
  • Effortless recharging of the camera battery via USB Type-C terminal
  • Outdoor-friendly monitor with a Night Vision LCD Display function, for speedy adjustment of the monitor’s brightness level depending on the shooting location
  • HDR (High Dynamic Range) function, for simplifying handheld photography and saving captured images as RAW-format files
  • Dual SD-card slot (with Slot One conforming to the UHS-II standard)
  • Ergonomic design of camera exterior and control parts, optimized to accommodate different hand sizes and finger lengths
  • Compatibility with old lenses without electronic contacts, for shooting in the Av (Aperture-priority) mode and saving the lens focal length as Exif data
  • Latest version of Digital Camera Utility 5 software included

Optional Accessories

D-BG8 Battery Grip

Designed for exclusive use with the PENTAX K-3 Mark III, this battery grip features dustproof, weather-resistant construction, and provides an extra set of control buttons (shutter release, Smart Function, AF/AE lock, exposure compensation, and green), a focus point selector lever, and a pair of electronic dials to facilitate vertical-position shooting. It is powered by the large-capacity D-LI90P Lithium-ion Battery, which is also used to power the camera body. This battery can be recharged using the camera’s USB terminal.

O-HC177 Hot shoe cover

A high-quality hot shoe cover for dressing up the camera body. The material is a stainless alloy, and the design is such that it is integrated with the pentaprism part.

Special limited editions (2)

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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.