Pentax K-5

from Wikipedia, the free encyclopedia
Pentax K-5
Pentax K-5 4773 06.jpg
Type: digital autofocus / AE reflex camera
Lens : all lenses with K-bayonet
Lens connection : K bayonet KAF2
Image sensor : CMOS Sony IMX071
Sensor size: APS-C
(23.7 mm × 15.7 mm)
Resolution : 16.3 megapixels
Image size: 4928 × 3264 pixels
Format factor : 1.53
Aspect ratio : 3: 2
File formats : JPEG (4 *), RAW (DNG, PEF), TIFF
Exposure index : Basic setting 100–25,600, expandable to 80–51,200
Reception readiness : 600 ms
Release delay : 104 ms
Viewfinder : Permanently installed pentaprism viewfinder
Field of view : 100%
Enlargement: 92%
Viewfinder display: AF data, exposure data, image stabilization functionality, spirit level
Screen : TFT color monitor
Size: 7.68 cm (3 ")
Resolution: 640 × 480 pixels VGA
Operating modes: P, Sv, Tv, Av, TAv, M, B, X, User, Video
Frame rate : Max. 7 frames per second
Number of continuous exposures: 24 RAW, JPEG continuous
Auto focus (AF) : Phase comparison , contrast autofocus
AF points: 11, 9, 1
AF measuring range: Cross sensor
AF modes: AF-S, AF-C
Exposure metering : 77-segment TTL aperture metering Spot metering / center-weighted metering
Measuring range: EV 0 to EV 22
Regulation: automatically or manually
Correction : +/- 5 EV in 1/3 or 1/2 increments
Closure : electronically controlled focal plane shutter
Shutter speed : 30-1 / 8000 s and Bulb
Lightning : can be folded out manually
Guide number : 13 at ISO (ASA) 100
Flash control: P-TTL
Lightning connection : Standard ISO shoe and flash socket
Synchronization : 1st or 2nd shutter curtain
Exposure compensation : manual: ± 3 steps in 1/3 steps
Flash functions: Red-eye pre-flash, long-term sync, long-term sync + anti-red-eye, wireless mode
Color space : sRGB , Adobe RGB
White balance : automatic, presets, manual, color temperature
Storage media : SDHC , SDXC
Data interface : USB 2.0 high-speed
Video interface: HDMI (Type C, Mini), Composite Video
Direct printing: DPOF
Power supply: Li-Ion battery D-LI90, power pack D-AC50E, battery handle D-BG4
Casing: Magnesium alloy and plastic
Dimensions: 131 mm × 97 mm × 73 mm
Weight: approx. 660 g (body only)
Additions: Image stabilizer in the camera for all lenses, spirit level in 2 axes, GPS using the optional O-GPS1 module for astro-tracing up to 300 s

The Pentax K-5 is a digital single-lens reflex camera from the Japanese manufacturer Pentax , which was presented at photokina in September 2010 as the successor to the Pentax K-7 and which came onto the market in October 2010. The central component is the IMX071 CMOS sensor developed by Sony , in which the A / D converters for signal conversion are located directly on the chip. It offers an effective resolution of 16.28 million pixels on 372 mm² and a maximum image size of 4928 × 3264 pixels.

In September 2012, two successor models were introduced with the Pentax K-5 II and the K-5 IIs . Both have improvements to the auto focus function and a modified rear display with significantly improved readability in bright ambient light. The K-5 IIs also lacks a low-pass filter in front of the sensor, which improves the detail resolution, but can also increase the risk of moiré , as with all cameras with Bayer sensors .

important characteristics

The sensor format 23.7 mm × 15.7 mm ( APS-C ) corresponds to a format factor of around 1.54 compared to the 35mm format.

The manufacturer specifies an effectiveness of up to 4 EV for the image stabilization system Shake Reduction . The stabilizer is built into the housing and can correct translational and rotational shaking. It works with all lenses, with older or adapted lenses the focal length used may have to be selected manually in the menu.

Power is supplied by a rechargeable lithium-ion battery of the type D-LI90. In an attached battery grip D-BG4 the supply from the battery can handle either with another lithium ion battery of the type D-LI90 or six NiMH batteries of Type AA effected.

The housing is sealed against splash water, moisture, sand and dust with 77 seals.

Camera with optional battery grip and GPS module

The weight without battery and memory card is 660 g, 740 g ready for use. The dimensions of the camera are 131 mm × 97 mm × 73 mm (W × H × D). The battery grip, which is already available as an accessory for the K-7 , also fits the K-5 and is also protected against dust and splash water with 43 seals.

In video mode, the resolution Full HD (1920 × 1080 pixels) with 25 fps is added to the resolutions HD (1280 × 720 pixels, 30/25 fps) and 640 × 480 pixels, 25/30 fps, the videos are saved with the motion JPEG codec, which is embedded in an AVI container file.

Copyright information and the name of the photographer can be embedded directly into the Exif data of the images by the camera .

The camera has an integrated HDR mode , which can also be used to record hands-free HDR recordings. The camera takes three pictures with -3, 0, +3 EV and aligns the pictures automatically. The strength of the effect can be selected automatically and in four levels.

A two-axis electronic spirit level is built in to help align the camera. It can also be used to automatically align the images when they are captured by the movably mounted image sensor.

With all lenses of the Pentax series DA (except fisheye 10–17 mm), DA *, DAL, D-FA, the Samsung D-Xenon and D-Xenogon of the same construction as well as three FA-Limited lenses (31 mm 1.8 , 43 mm 1.9 and 77 mm 1.8), the distortion and lateral chromatic aberration ( lateral chromatic aberration ) can be corrected by the camera when taking the picture. If this function is activated, the computing time required for saving is extended.

  • Pentax K-5 with 40 mm / 2.8 limited

  • Pentax K-5, rear view

  • Pentax K-5, top view

  • Pentax K-5, section through the camera

Bayonet and lenses

The K AF2 bayonet is backwards compatible with all K bayonet lenses that have been built since 1975. Contacts for controlling lenses with focusing by ultrasonic motor are available. In addition, the K-5 has an autofocus motor inside the housing, which drives Pentax AF lenses without their own motor. The dimming option is used for the depth of field preview. For the digital image preview, a test picture is displayed on the monitor and can be saved.

technical description

The exposure index can be set automatically and manually from ISO 100 up to ISO 12,800, in extended mode from ISO 80 up to ISO 51,200; the intermediate values ​​can be set in half or third steps. The shutter speeds can be set from 1/8000 to 30 seconds, plus there is long exposure (B) and flash sync speed (X) 1/180 second. The images can be saved in the three formats JPG (4 qualities), PEF (Pentax's own raw format) and the manufacturer-independent DNG format. The strength of the noise reduction can be set individually for each ISO value. Pentax's own PEF format has been expanded from 12 to 14 bits for this camera.

The exposure measurement takes place in 77 fields, which can be evaluated as a matrix, center-weighted or spot-oriented. Corrections are possible in the range of ± 5 EV in 1/3 steps.

The glass pentaprism viewfinder has a magnification of 0.95, 100% field of view and exchangeable focusing screens.

The LC display has a size of three inches, a resolution of 921,000 (640 × 480 RGB) pixels and a viewing angle of up to 170 °. The monitor can be used to view in live view mode and, in addition to normal phase AF, to focus with contrast autofocus - optionally with or without face recognition; The depth of field can be assessed in both modes . The monitor can be calibrated in 49 steps.

The A / D converter works with 14 bit color depth. There is a fine correction of the white balance presets as well as several memory locations for manual white balance. Five user programs are used to save and quickly call up a user-specific camera configuration.

Exposure series with three or five images are possible, with different parameters being varied: exposure time, white balance, saturation, contrast and sharpness. You can also do multiple exposures. The captured images can be edited using nine filters.

The series image speed is a maximum of seven images / second (Hi) or 1.6 images / second (Lo) . In Hi mode, up to 30 images can be recorded as JPEG and 8 images (since the firmware update to version 1.01 approx. 23 images) in RAW mode ( raw data format ) continuously at maximum speed, after which the camera records at reduced speed (depending on the maximum continuous write speed of the memory card).

The 11-point autofocus system (SAFOX IX +) is equipped with nine cross sensors . With the AF fine adjustment, front or back focus problems of individual lenses can be corrected.

Three focus modes are possible: AF-S (one-time autofocus), AF-C (continuous autofocus) and manual. All eleven, the middle five, the central one or one of the eleven sensors can be selected for the autofocus. In very low light, the camera switches on a green LED auxiliary light to focus .

An external flash can be controlled wirelessly using the built-in flash. There is still an X synchronous contact for flash systems. Flash can also be used on the second shutter curtain (with the internal flash and with certain system flash units).

The firmware of the camera is maintained by Pentax. Version 1.16 was released in March 2014, and the current firmware 1.07 for the K-5 II and K-5 IIs models is also from 2014.

Web links

Commons : Pentax K-5  - collection of pictures, videos and audio files

Individual evidence

  1. ↑ Pentax K-5 - SLR cameras - PENTAX photo , Pentax website
  2. ↑ Battery handle D-BG4 ( Memento of April 9, 2012 in the Internet Archive ), Pentax website
  3. ↑ German manual, page 188; Display in the camera: Menu Camera / Video / Resolution