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The new CMOS image sensor, exclusively developed for K20D, is designed to optimize the performance of PENTAX interchangeable lenses. Featuring approximately 14.6 effective megapixels and the latest noise-reduction technology, it assures superb image quality a step above its predecessors
The K20D also offers an array of advanced features and user-friendly functions, including: a new Custom Image function that lets the user select or adjust the image's finishing touches to their preference; an upgraded, more reliable SR (Shake Reduction) system; a comprehensive Dust Removal system; a multi-mode exposure system for faithful reproduction of the photographer's creative intentions; and a dependable dust-proof, water-resistant body construction. As a result, the K20D easily meets the diversified, exacting demands of discerning photographers
The K20D also incorporates the PENTAX-original PRIME (PENTAX Real Image Engine) as its imaging engine. Designed exclusively for PENTAX digital SLR cameras, it assures well-balanced, true-to-life images
The new Live view function allows the user to view the image on the large 2.7" LCD monitor on the camera's back panel during shooting. This comes handy when the photographer must move his or her eye from the viewfinder in specialized applications, such as low- and high-angle compositions. The K20D has added a dynamic-range expansion function, which allows the user to expand a dynamic range (or a range of gradation reproduction) while retaining the proper contrast to avoid white-washed areas. With an approximately 1EV expansion effect, it assures beautiful, rich-gradation images. Also its luminous sensitivity operates over an extended range of ISO 100 to ISO 6400
Due to demand by photographers and the trade the K20D is equipped with finer compression stages. Now 4 JPEG compression levels are available providing for more highly detailed pictures. Most relevant for those in the know, the camera can store files as JPEG or as RAW or, depending upon user preference, simultaneously as both JPEG and RAW. The RAW selection may be either the Pentax "PEF" standard or the Adobe Photoshop "DNG" format. By pressing the RAW button the file format can easily be changed and the sequence individually specified
Additionally the K20D works with a precision 11-point autofocus system with 9 cross sensors (SAFOX VIII) and the AF is freely adjustable. With the "AF Adjustment" function the focal point can be uniquely optimized for each lens, or, when desired, for all lenses around a freely adjustable, correction factor. Front or back focus problems are now a thing of the past. The list of functions available on the K20D goes on, all with one aim in mind which is to generate the highest quality image possible
The 16-45mm lens that accompanies this K20D is optimally designed, as are all of the PENTAX lenses to match the performance of the digital technology of the PENTAX digital cameras. With a focal length of 24mm (equivalent in 35mm) impressive new wider-angle views that are unattainable with a standard zoom lens. This versatility is further enhanced by the ability to zoom to a focal length of approximately 70mm (equivalent in 35mm). And these achievements are underlined by maintaining a fixed aperture of f4.0 throughout the entire zoom range