Pentax K-x

For the 35mm film camera, see Pentax KX.
Pentax K-x
Overview
Type Digital single-lens reflex camera
Lens
Lens Interchangeable Pentax KAF2 mount compatible with Pentax auto-aperture lenses and SDM lenses; older lenses supported in stop-down metering mode.
Sensor/Medium
Sensor 23.6 × 15.8 mm CMOS image sensor with a primary color filter
Maximum resolution 12.4 megapixels
ASA/ISO range ISO Auto, 200, 400, 800, 1600, 3200, 6400 (100, 12800 with expansion)
Recording medium SD, SDHC, SDXC
Exposure/Metering
Exposure modes Program, Shutter-Speed Priority, Aperture Priority, Manual, Bulb, Auto, Picture modes (Standard, Portrait, Landscape, Macro, Action, Night scene portrait, Standard flash-off)
Exposure metering TTL open-aperture metering with choice of: 16-segment, Center-weighted & Spot meter
Shutter
Shutter speed range 1/6000 sec – 30 sec, Bulb
Viewfinder
Viewfinder Eye-level pentamirror, 96% coverage, 0.85x magnification
General
Rear LCD monitor 2.7", 230,000 pixels
Battery AA (×4), Optional AC adapter
Weight 515 g (18.2 oz) without battery
Made in Philippines

The Pentax K-x is a 12.4 megapixel digital single-lens reflex camera, announced on September 16, 2009.[1] Pentax K-x uses an Exmor, Sony-made sensor (different from the back-lit Exmor-R used in other Sony models).[2] In some cases it even approaches the quality produced by full-frame DSLRs like the Nikon D700 and the Canon 5DMkII, both with larger sensors. The Pentax K-x is suitable for low light conditions for both still and video photography.[3][4]

The K-x is a compact model above the entry-level K2000/K-m. It is lighter than other Pentax DSLRs, including the K2000, and lacks the weather sealing of the K10D, K200D, K20D, and K-7, and is intended to be sold with lightweight DA-L-series lenses. It offers some improvements over the high-end K-7, including a maximum sensitivity of ISO 12800 with lower noise than comparable cameras and even than some of higher class, a maximum shutter speed improved to 1/6000 s, and a faster burst mode of 4.7 frame/s.[5] DPReview.com has observed that the K-x offers many of the same features as the K-7 features in what is essentially the same body as the K2000[6]

The K-x also offers a large range of body colors compared to the traditional black DSLR body.[6] In Japan, up to 100 color combinations are available.[7]

The Pentax K-x won the Technical Image Press Association (TIPA) award for Best DSLR Entry Level in Europe 2010[8] and Time Magazine listed the Pentax K-x in its Best Travel Gadgets of 2009 list.[9]

The Pentax K-x is often sold packaged with the DA-L 18-55mm f/3.5-5.6 kit lens.[5]

Other features:

The K-x was discontinued in March, 2011, shortly after the Pentax K-r was introduced. Also introduced at a similar pricepoint was the mirrorless Pentax K-01.

In-body stabilization

The built in Shake Reduction function automatically turns off in the following situations.

High dynamic range imaging (HDR)

HDR takes 3 frames of different exposure and combines them into a single jpeg image while turning off the shake reduction.

This essentially means tripod only shots in most cases while trying to minimize any movement.

Self Timer would be the ideal method but unfortunately the Pentax K-x HDR feature cannot be used with the camera's selftimer as it is not enabled in Firmware 1.01 and 1.02 for reasons unknown.

This lack of Timer "drive mode" can be compensated for with a Pentax IR Remote and Remote "drive mode" selection.

AA battery life

There are many reports that using 4xAA rechargeable Sanyo Eneloops will give ~500-1000 photos on a single charge with firmware 1.01 depending on usage.

In a DPReview test of different AA batteries:[10]

The biggest effect on battery life is using LiveView and Video.

RAW formats

The camera can shoot RAW images using either the Pentax PEF format or the open standard Adobe Digital negative (DNG). Shooting RAW and a JPEG at the same time is also possible.

Video function

The camera is capable of recording HD Video files which made it quite popular for some independent filmmakers. The camera is using the "DV codec alike" MJPEG codec, which is a very soft compression that creates relatively huge video files but on the other hand allows editing of this video files even on older editing systems with less CPU power. The advantage of this compression method is that it saves every single frame as a progressive frame and is (compared to AVCHD) not only saving the changes inside the group of pictures.

Videos can be recorded either in HD (1280x720p) or SD (640x416), both with 24 frame/s. They are stored as AVI files.

The sound of the videos are all uncompressed PCM 32 kHz, 16 bit. If sound is not needed for video recordings, it can be deactivated and silent videos can be recorded.

There is no limitation for the length of a video. The only limitation is the file size for each video file which is 4 GB (the maximum file size that is allowed by the FAT32 format of the SDHC cards). So it is possible to shoot until the card is full or the batteries are empty or the sensor has excessive heat (usually after 12 minutes of continuous video shooting).

Firmware

The Pentax K-x Firmware updates have added functionality and fixed a few issues.[11]

See also

References

  1. ↑ "PENTAX K-x: A High-Performance Entry-Class Digital SLR Camera, Packaging Movie Recording, High-Speed Continuous Shooting and User-Friendly Operation in Compact, Lightweight Body" (Press release). Pentax imaging. 2009-09-16.
  2. ↑ http://www.sulit.com.ph/index.php/view+classifieds/id/2177950/
  3. ↑ Pentax K-x - Unbiased digital camera reviews, prices, and advice http://www.digitalcamera-hq.com/products/pentax-k-x
  4. ↑ Pentax and Sony DSLR Face-Off: http://www.tomsguide.com/us/DSLR-Pentax-Sony,review-1467.html
  5. 1 2 "Pentax announces K-x entry level DSLR". Digital Photography Review. 2009-09-17. Retrieved 2009-09-17.
  6. 1 2 "Pentax K-x brief hands-on". Digital Photography Review. 2009-09-17. Retrieved 2009-09-17.
  7. ↑ http://www.radiantlite.com/2009/09/pentax-k-x-vs-competitors.html
  8. ↑ http://currentphotographer.com/pentax-k-x-wins-tipa-award-for-best-entry-level-dslr/
  9. ↑ Time Magazine -
  10. ↑ http://www.dpreview.com/reviews/pentaxkx/13
  11. ↑ http://www.pentax.jp/english/support/digital/k-x_s.html
Wikimedia Commons has media related to Pentax K-x and Taken with Pentax K-x.

Reviews

Pentax digital interchangeable lens camera timeline
Class Sensor 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
34 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234 1234
Professional DSLR MF 645D 645Z
FF K-1
High-end DSLR APS-C K-3 II
K-3
Advanced DSLR K-7 K-5 K-5 II/K-5 IIs
*ist D K10D K20D
Midrange DSLR K100D 100DS K200D K-30 K-50 K-70
Entry-level DSLR *ist DS *ist DS2 K-r K-500 K-S2
*ist DL DL2 K110D K-m/K2000 K-x K-S1
K-mount MILC K-01
Q-mount MILC 1/1.7" Q7
Q-S1
1/2.3" Q Q10
Prototype DSLRs
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