Pentax K-r

APS-C AF digital SLR camera

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Specification

Production details
Announced:September 2010
System: Pentax K APS-C (2003)
Imaging plane
Maximum format:APS-C
Mount and Flange focal distance:Pentax K [45.5mm]
Imaging plane:23.6 × 15.8mm CMOS sensor
Resolution:4288 × 2848 - 12 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:544g
Dimensions:125x97x68mm

Manufacturer description #1

September 9, 2010 - HOYA CORPORATION PENTAX Products is pleased to announce the launch of the PENTAX K-r lens-interchangeable digital SLR camera. Encased in a compact, lightweight body, this new model combines simple, user-friendly operation with a wide array of advanced features designed to enhance the fun and excitement of digital SLR photography.

Developed to be an entry model targeted at digital SLR novices and family users, the PENTAX K-r not only offers an assortment of features and functions that make it easy for everyone to effortlessly capture high-quality images people expect of a digital SLR camera, but it also comes equipped with a host of handy tools that help user in creating more personalized, creative images. They range from high-quality image reproduction with approximately 12.4 effective megapixels and HDTV-proportion movie recording, to high-speed continuous shooting at approximately six images per second, super-high-sensitivity shooting at ISO 25600 (via a custom function) and a large, easy-to-view 3.0-inch high-resolution color LCD monitor. Its dual-power-source design offers a choice between the standard rechargeable lithium-ion battery and a set of AA-size batteries.* It also offers a greater selection of digital filters for effortless production of original, creative artwork. All combined, the K-r boosts outstanding performance and versatility, almost the equivalent of upper-class digital SLR cameras, while allowing the photographer to easily deal with different photographic requirements and to accommodate individual shooting styles. It is also compatible with the IrSimple™ high-speed infrared data transmission system for wireless data transfer to IrSimple-compatible devices, and for swift image data exchange and match-game playing between two PENTAX K-r’s. Totally new capabilities in a digital SLR camera, these features make the K-r a unique, new-generation communications tool.

* Requires the optional AA Battery Holder D-BH109 to hold four AA-size batteries.

Major Features

1. High-quality, true-to-life image reproduction

The K-r incorporates a new-generation CMOS image sensor with approximately 12.4 effective megapixels to assure high-speed image data readout. It also features the high-performance PRIME (PENTAX Real Image Engine) II imaging engine to ensure accurate and high-speed data processing equal to that of upper-level models. As the result, the K-r produces high-quality images with fine detail, rich gradation and superb rendition, while suppressing annoying digital noise to a minimum. The K-r also offers a wide sensitivity range between ISO 200 and ISO 12800; this range can be expanded from ISO 100 to ISO 25600 via a custom function.

2. Compact, lightweight body

Despite the incorporation of the large 23.6mm x 15.8mm image sensor, the K-r sports a compact, lightweight body, thanks to a trim, lightweight stainless-steel chassis, a downsized in-body shake reduction mechanism, and state-of-the-art, high-density packaging technologies that assure space-efficient positioning and layout of the camera components.

3. High-speed continuous shooting at approximately six images per second

The K-r’s high-speed continuous shooting mode records as many as 25 images (in JPEG recording format) in a single sequence at a maximum speed of approximately six images per second — the fastest of all entry-class models — allowing the photographer to preserve sharp, crisp images of fast-moving subjects with great ease.

4. High-precision AF system

The K-r’s high-precision, wide-frame SAFOX IX autofocus system features 11 sensor points (with nine cross-type sensors positioned in the middle) to assure pinpoint focus on the subject. The K-r is also equipped with a spotbeam projector to assist the AF system in poorly lit locations. The accuracy and speed of contrast AF operation during Live View shooting has also been enhanced by the incorporation of a new-generation image sensor and drastic upgrading of AF algorithms.

5. Bright, clear optical viewfinder

Thanks to the combination of PENTAX-original finder optics and the renowned Natural-Bright-Matte focusing screen, the K-r’s viewfinder offers a bright, clear subject image at 0.85X magnification and with a 96% field of view. Since it assures excellent visibility even in bright outdoor locations and provides delay-free, real-time display of the subject’s image, it is especially helpful in shooting where the timing of shutter release is critical, such as sports photography. The in-focus point is indicated as a red point in the viewfinder for at-a-glance confirmation.

6. Large, easy-to-view 3.0-inch LCD monitor with wide-view design and approximately 921,000 dots

The K-r features a large, high-resolution color LCD monitor with approximately 921,000 dots. Its wide-view design assures a clear view of the monitor image from approximately 170 degrees horizontally and vertically, making it particularly useful in low- and high-angle applications during Live View shooting.

7. Versatile dual-power-source design

In addition to the standard rechargeable lithium-ion battery, which allows the photographer to capture approximately 560 images with a single recharge,** the K-r can also be powered by four AA-size batteries using optional AA Battery Holder D-BH109. Since these world-standard batteries are available almost anywhere, it removes worries about unexpected battery shortage, especially on the road.

** Based on the PENTAX in-house testing conditions conforming to the CIPA standards, using a rechargeable D-LI109 Lithium-Ion Battery.

8. PENTAX-original SR mechanism for sharp, blur-free images

The K-r features the PENTAX-developed SR (Shake Reduction) mechanism, which effectively compensates the adverse effect of camera shake by up to approximately four shutter steps. This innovative mechanism extends its benefits to almost all PENTAX interchangeable lenses — even those designed for film-format cameras.*** Thanks to this user-friendly mechanism, the K-r produces sharp, blur-free images even under demanding conditions prone to camera shake, such as when using a telephoto lens, shooting in the dark without flash illumination, and taking pictures of sunset scenes.

*** Lenses compatible with this mechanism: PENTAX K-, KA-, KAF-, KAF2- and KAF3-mount lenses; screw-mounted lenses (with an adapter); and 645- and 67-system lenses (with an adapter). Some functions may not be available with certain lenses.

9. Innovative image-processing functions to produce distinctive photographic expressions

i. Custom image function for distinctive finishing touches

The K-r features the custom image function, which allows the user to easily select a desired finishing touch for a particular image in order to more faithfully express his/her creative intention or emphasize the prevailing atmosphere. The K-r offers a choice of nine custom image modes including Bleach Bypass, which is designed to create a dramatic visual effect used in motion pictures.

ii. Versatile digital filter function

The K-r’s digital filter function allows the user to process recorded images in a variety of creative ways and produce highly creative visual expressions — without the need of a computer. The user not only has a choice of 18 different filters, including the newly added Starburst, Sketch and Posterization, but can also apply different filters one after another to a single image to create more inventive visual effects.

iii. Cross process mode with three options

The K-r features the unique cross process mode, in which the camera automatically shifts photographic parameters for each exposure to create eye-catching images with unique, dramatic colors — just like pictures treated with the cross process**** in film photography. In addition to “Random”, where the results are unpredictable until the image has been processed, the user also has two other options: “Preset”, with three different sets of preset parameters; and “Favorite”, with user-input parameters.

**** A film development technique that uses unconventional film development to create a distinctive finish with dramatic, stylized colors.

iv. Upgraded HDR (High Dynamic Range) function

The K-r features the HDR (high dynamic range) function to create one composite image with an extra-wide gradation range from three images with different exposures, without the need of a computer application. It offers a choice of auto, standard and expanded (at three levels) modes to accommodate different creative intentions. Thanks to the introduction of Auto Align function, the user can now take advantage of this creative tool even with handheld shooting.

10. High-speed infrared data transmission system

The K-r is the first PENTAX digital SLR camera equipped with the IrSimple™ high-speed infrared data transmission system. Since this system allows the user to transfer image data to IrSimple-compatible digital devices with great ease, users can effortlessly post images taken with the K-r on their own blogs via a cellular phone. This system also makes the K-r a brand-new photo communication tool, as it also allows users to exchange their image data using a pair of K-r, and even let them engage in a simple match game using Exif data attached to the images such as aperture or shutter-speed values.

11. High-quality, HDTV-proportion movie recording at 1280 x 720 pixels and at 25 frames per second

The K-r provides a movie-recording function,***** which captures beautiful, true-to-life movie clips in 16:9 high-definition TV proportions (1280 x 720 pixels) at a frame rate of 25 frames per second. This extends many benefits of high-quality SLR photography to the world of movie shooting: For instance, reduce the depth of field to make a subject stand out, or use different interchangeable lenses to create distinctive visual effects. The K-r also assures a greater possibility of visual presentation in movies — either through the application of digital filters, such as Toy Camera and Retro, to add specific visual effects during shooting, or through the use of various movie-editing functions after shooting.

***** When the PENTAX K-r’s AV output terminal is used, movie clips are output at normal resolution. The data must be transferred to a PC for the playback of movie clips at high-definition TV proportions (1280 x 720 pixels).

12. Other features

  1. DR (Dust Removal) mechanism, to shake dust off the CMOS image sensor.
  2. User-friendly layout of essential control buttons and levers, all positioned on the camera’s grip side for quick, effortless access by the photographer’s right hand.
  3. Auto Picture mode, for effortless, automatic selection of the most appropriate shooting mode, even during Live View shooting.
  4. Eleven scene modes, including a new Night Scene HDR mode.
  5. Versatile white balance control, featuring a new CTE mode designed to emphasize the dominant color components of the captured images which works best with such scene as sunset.
  6. Automatic compensation of distortion and lateral chromatic aberration (available only with DA-,DFA- and FA Limited-series lenses).
  7. PENTAX Digital Camera Utility 4 software package, with RAW-data processing and browser applications.

[Optional Accessory]

AA Battery Holder D-BH109

Exclusively designed as an alternative power source of the PENTAX K-r, this optional accessory holds four AA-size batteries - easily available anywhere.

Manufacturer description #2

PENTAX Imaging Systems announces the launch of its latest digital SLR camera – the K-r. Encased in a compact, lightweight body, this new model combines simple, user-friendly functions with a wide array of advanced features, designed to enhance the fun and excitement of digital SLR photography.

Developed to be a mid-range model targeted at digital SLR novices and family users, the PENTAX K-r offers an assortment of features and functions that make it easy for everyone to effortlessly capture the high-quality images people expect of a digital SLR camera.

In addition it comes equipped with a host of handy tools that help create more personalised, creative images, including:

  • high-quality image reproduction with approximately 12.4 effective megapixels
  • HDTV-proportion movie recording
  • high-speed continuous shooting at approximately six images per second
  • super-high-sensitivity shooting at ISO 25600 (via a custom function)
  • a large, easy-to-view 3.0-inch high-resolution colour LCD monitor

The K-r boasts outstanding performance and versatility, almost the equivalent of more advanced digital SLR cameras, while allowing the photographer to easily deal with different photographic requirements. Its dual-power-source design offers a choice between the standard rechargeable lithium-ion battery and a set of AA-size batteries.

It is also compatible with the IrSimple™ high-speed infrared data transmission system for wireless data transfer to IrSimple-compatible devices, and for swift image data exchange.

What are its key functions?

  • High-quality, true-to-life image reproduction: The K-r incorporates a new-generation CMOS image sensor with approximately 12.4 effective megapixels. It also features the high-performance PRIME (PENTAX Real Image Engine) II imaging engine to ensure accurate and high-speed data processing equal to that of upper-level models
  • Compact, lightweight body: Despite the incorporation of the large 23.6mm x 15.8mm image sensor, the K-r sports a compact, lightweight body, thanks to a trim, stainless-steel chassis, a downsized in-body shake reduction mechanism, and state-of-the-art, high-density packaging technologies that ensure space-efficient positioning and layout of the camera components
  • High-speed continuous shooting at approximately six images per second: The shooting mode records as many as 25 images (in JPEG recording format) in a single sequence at a maximum speed of approximately six images per second — the fastest of all entry-class models
  • High-precision AF system: The K-r’s high-precision, wide-frame SAFOX IX autofocus system features 11 sensor points (with nine cross-type sensors positioned in the middle) for pin sharp focusing. Spot beam is also available for difficult lighting situations.
  • Bright, clear optical viewfinder: Thanks to the combination of PENTAX-original finder optics and the renowned Natural-Bright-Matte focusing screen, the K-r’s viewfinder offers a bright, clear subject image at 0.85X magnification and a 96% field of view
  • Large, easy-to-view 3.0-inch LCD monitor with wide-view design and approximately 921,000 dots: High-resolution colour LCD monitor with approximately 921,000 dots. Its wide-view design assures a clear view of the monitor image from approximately 170 degrees horizontally and vertically
  • Versatile dual-power-source design: Powered by a standard rechargeable lithium-ion battery or four AA-size batteries using optional AA Battery Holder D-BH109
  • PENTAX-original SR mechanism for sharp, blur-free images: Features the PENTAX-developed SR (Shake Reduction) mechanism, producing sharp, blur-free images even under demanding conditions prone to camera shake; compatible with the full range of Pentax lenses
  • Innovative image-processing functions to produce distinctive photographic expressions: Custom image function for distinctive finishing touches/ Versatile digital filter function/ Cross process mode with three options/ Upgraded HDR (High Dynamic Range) function
  • High-speed infrared data transmission system: The first PENTAX digital SLR camera equipped with the IrSimple™ high-speed infrared data transmission system
  • High-quality, HDTV-proportion movie recording at 1280 x 720 pixels and at 25 frames per second: True-to-life movie clips in 16:9 high-definition TV proportions (1280 x 720 pixels) at a frame rate of 25 frames per second

In addition it has...

  • DR (Dust Removal) mechanism, to shake dust off the CMOS image sensor
  • User-friendly layout of essential control buttons and levers, all positioned on the camera’s grip side for quick, effortless access by the photographer
  • Auto Picture mode, for effortless, automatic selection of the most appropriate shooting mode, even during Live View shooting
  • Eleven scene modes, including a new Night Scene HDR mode
  • Versatile white balance control, featuring a new CTE mode designed to emphasise the dominant colour components of the captured images
  • Automatic compensation of distortion and lateral chromatic aberration (available only with DA-,DFA- and FA Limited-series lenses)
  • PENTAX Digital Camera Utility 4 software package, with RAW-data processing and browser applications

The PENTAX K-r will be available from October 2010

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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.