Pentax K-5
The Pentax K -5 is a Japanese manufacturer Pentax digital SLR, which was introduced at Photokina in September 2010 as the successor of the Pentax K -7 and came on the market in October 2010. The central component is developed by Sony IMX071 CMOS sensor, in which the A / D converter are accommodated for signal conversion directly on the chip. It offers an effective resolution of 16.28 million pixels to 372 mm ² and a maximum image size of 4928 × 3264 pixels.
In September 2012, K-5 II and the K -5 IIs two successor models were introduced with the Pentax. Both have improvements to auto focus and have a modified rear display. The K -5 IIs also lacks a low-pass filter in front of the sensor, which can increase the resolution of detail.
Important features
The sensor size 23.7 mm × 15.7 mm (APS -C ) corresponds to a form factor of about 1.54 compared to the small format.
For the image stabilization system Shake Reduction, the manufacturer specifies a validity of up to 4 EV. The stabilizer is built into the housing and can correct translational and rotational camera shake elle. It works with all lenses, the elderly or adapted lenses, the focal length used may need to be manually selected 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 grip can be done either with an additional lithium -ion battery D- LI90 type or with six NiMH batteries size AA.
The housing is sealed with 77 seals against water spray, humidity, sand and dust.
Weight is without battery and memory card 660 g, 740 g ready The dimensions of the camera are 131 mm × 97 mm × 73 mm (W × H × D). The available already as an accessory to the K- 7 battery grip also fits the K -5 and is also protected with 43 seals against dust and splash water.
In the video mode, the resolution Full HD (1920 × 1080 ) at 25 fps at the resolution HD ( 1280 × 720, 30/25 fps) and 640 × 480, added 25/30 fps, saved the video with the Motion JPEG codec which is embedded in an AVI container file.
Copyright information and the name of the photographer can be embedded by the camera directly into the EXIF data of the images.
The camera has an integrated HDR mode, with which can also accommodate hands-free HDR images. The camera takes three images at -3, 0, 3 EV and automatically sets up the images on each other. The strength of the effect is automatic and selectable in four steps.
Built is a dual-axis electronic level, which helps in the orientation of the camera. It can also be used for automatic alignment of the images while recording by the movably mounted image sensor.
For all lenses, the Pentax DA series (except Fisheye 10-17 mm), DA *, DAL, D FA, each identical to the Samsung D - Xenon and D- Xenogon and three FA Limited lenses ( 31mm 1.8, 43 mm 1.9 and 77mm 1.8 ), the distortion and lateral chromatic aberration ( lateral chromatic aberration ) have to be corrected when recording from the camera. When this feature is enabled, the computational time required to store extended.
Pentax K-5, Rear View
Pentax K -5, top view
Pentax K -5, section through the camera
Bayonet and Lenses
The KAF2 bayonet is backwards compatible with all K- mount lenses that have been built since 1975. Contacts for controlling lenses with focusing via ultrasonic motor are available. In addition, the K-5 has a housing internal autofocus motor which drives Pentax AF lenses without own motor. The Abblendmöglichkeit is the depth of field preview. For the digital image Preview a sample image on the monitor will be displayed and can be saved.
Technical Description
The light sensitivity can be set from ISO 100 to 12,800 ISO automatically and manually, in Enhanced mode from ISO 80 up to ISO 51,200; the intermediate values can be set in half or third stages. Shutter speeds are adjustable from 1/8000 to 30 seconds, plus there is long-term exposure (B) and flash sync speed (X) 1/180 second. The images can in the three formats JPG ( 4 grades ), PEF ( Pentax a proprietary raw format ) and the manufacturer- independent DNG format are saved. For each ISO value, the amount of noise reduction can be adjusted individually. The Pentax 's own PEF format has been extended with this camera from 12 to 14 bits.
The exposure is determined in 77 fields that can be used as matrix, center-weighted or spot oriented evaluated. Corrections are possible in the range of ± 5 EV in 1/3-stop increments.
The glass pentaprism viewfinder features a 0.95 -times magnification, 100 % field of view and interchangeable focusing screens.
The LCD display has a size of three inches, a resolution of 921,000 (640 × 480 RGB) pixels and a viewing angle of up to 170 °. About the monitor can be viewed in Live View mode, and in addition to the normal phase AF with contrast autofocus - be focused - it either with or without face detection; in both modes is possible an assessment of the depth of field. The monitor is calibrated in 49 steps.
The A / D converter operates with 14-bit color depth. There are a fine correction of the white balance presets and several presets for manual white balance. Five user programs are used to store and quickly recall a user-defined camera configuration.
Bracketing with three or five images are possible, while different parameters can be varied: exposure time, white balance, saturation, contrast and sharpness. In addition, you can also make multiple exposures. The captured images can be edited through nine filters.
The burst speed is a maximum of seven frames / second (Hi) or 1.6 frames / second ( Lo). Hi - Fashion ( raw format ) up to 30 frames as JPEG and 8 pictures (since firmware update to version 1.01 circa 23 images ) in RAW mode are taken continuously at maximum speed, then the camera takes a reduced speed (depending on the maximum continuous writing speed to the memory card).
The 11- point autofocus system ( SAFOX IX ) is equipped with nine cross-type sensors. By the AF fine adjustment is front or back focus problems of individual lenses can correct.
There are three focus modes available: AF-S (single -servo AF), AF-C (continuous autofocus ) and manual. For the autofocus can all eleven, the middle five, the central or be selected from the eleven sensors. In very low light the camera to focus turns to a green LED illuminator.
The flash control an external flash can wirelessly via the built-in flash. There continues to be a X-sync contact of lightning. Flashes can be applied to the second shutter curtain ( with the internal flash and certain flash units ).
The firmware of the camera is maintained by Pentax. In January 2013, version 1.14 was released.