Pentax K-3

The Pentax K-3 is a digital SLR camera, which is sold by the Japanese manufacturer Ricoh branded Pentax. It was presented on 8 October 2013 as the new top model in the range. The central component is a standard developed by Sony CMOS sensor, in which the A / D converter are accommodated for signal conversion directly on the chip. It offers an effective resolution of 23.35 megapixels to 366 mm ² and a maximum image size of 6016 × 4000 pixels.

Important features

The sensor size 23.5 mm × 15.6 mm (APS -C ) corresponds to a form factor of about 1.535 compared to the small format.

For the image stabilization system Shake Reduction (SR ), the manufacturer specifies a validity of up to 4 EV. The 3D image stabilization is built into the housing and can be corrected by moving the sensor camera shake in all 3 axes and rotations. It works with all lenses, the elderly or adapted lenses, the focal length used may need to be manually selected in the menu. This system of the image stabilizer still offers two additional functions.

The one suppresses the moire effect, since it has dispensed an anti- aliasing filter to increase the resolution. These can be moved during the exposure in two stages, the SR system to suppress the aliasing by a motion blur on the subpixel level. The movement frequency for this is at 500 Hz and operates safely to shutter speeds of 1 /1000 second but also brings to 1/8000s improvements of the image. This is the first switchable anti - moiré system.

The second function is a tilt-shift function, with which it is possible to use the sensor in 24 steps by ± 1.5 mm horizontally and vertically to move and tilt the sensor in 8 steps of ± 1 °. This achieves an image section adjustment. Furthermore, this mechanism is implemented via the Astro Tracer function, so that at very long exposure times, the stars are not presented as circular arcs rather than points.

Power is supplied by a rechargeable lithium -ion battery of the type D- LI90. In an attached battery grip D- BG5 the supply from the battery grip can be done either with an additional lithium -ion battery or six NiMH batteries size AA.

The housing is sealed with 92 seals against water spray, humidity, sand and dust.

Weight is without battery and memory card 715 g, 795 g ready The dimensions of the camera 131.5 mm x 100 mm x 77.5 mm (W × H × D). An optional accessory battery grip is also protected against dust and splash water. The camera can be provided according to the manufacturer for continuous operation over the temperature range from -10 ° C to 40 ° C.

In video mode, the resolution Full HD (1920 × 1080, 60i/50i/30p/25p/24p ), 4K and HD ( 1280 × 720, 60p/50p/30p/25p/24p ) available; the data formats are H.264/MPEG-4 AVC ( MOV) for video or Motion JPEG ( AVI) at Interval film shooting in 4K. The exposure and the sound are controlled manually. A connection for stereo microphone and a headphone output are available.

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 from each other. The strength of the effect is automatic and selectable in four steps. The result can be saved in raw format.

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.

Rear and top

Front lens with 40mm XS and top view

Front lens with 40mm XS and top view

Front with opened flash

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-3 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 sensor sensitivity can be set from ISO 100 up to ISO 51,200 automatic and manual, the intermediate values ​​are adjustable 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 ( three quality levels ), PEF ( Pentax a proprietary raw format ) and the manufacturer- independent DNG format are saved. Images are stored in the raw format with 14-bit resolution. For each ISO value, the amount of noise reduction can be adjusted individually.

The exposure is determined with an RGB sensor with 86,000 pixels, which can be used as matrix, center-weighted or spot oriented evaluated. Corrections are possible in the range of ± 5 EV in ⅓ increments.

The glass pentaprism viewfinder features a 0.95 -times magnification, 100 % field of view and interchangeable focusing screens, with new coatings it has also become brighter compared to previous models.

The LCD display has a size of 3.2 inches, a resolution of 1.013 megapixels 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. Also added is an automatic multi-field alignment, that mixed light situations can be better corrected. Three 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 8.3 frames / second (Hi ), 5 (mid ) or 3 frames / second ( Lo). Hi -Mode can be recorded as JPEG and 23 images in raw format continuously at maximum speed up to 60 images; then takes the camera at a reduced speed (depending on the maximum continuous writing speed of the memory card).

The 27 -point phase detection autofocus system ( SAFOX XI) is equipped with 25 cross-type sensors, the two are remaining linear sensors. The middle three which are arranged vertically one above the other, are designed for high-intensity optics with an aperture from 1:2.8 and thus allow a better focusing. You can select different modes; such as Auto -25, Auto -9, Auto- 5, free choice of a sensor and a central point. The position of this field within the 5 × 5 matrix can be freely selected in Auto -9 or car 5. Additionally, the following Focus possibilities are available: Contrast AF, object tracking, face detection, manual focus on both the optical viewfinder and on the LCD display.

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. Difficult to focus on different combinations of sensors are selected. At very low light, the camera can switch to focus a green LED illuminator.

In Live View beside the contrast autofocus a Fokuspeakingfunktion is implemented, this shows on the display the locations of the maximum edge contrast and therefore helps during manual focusing, the focus lay to the right place in the image.

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 ).

Both the photo- as well as the video area is a control interval available. In the photosphere, the intervals between one second and 24 hours for up to 2,000 images can be selected. In the video area, the intervals can be selected from two seconds to one hour; the maximum recording time is therefore 55 hours.