2424 effective megapixel AAfilterless APSC CMOS sensor with ISO from 100 to 102400 Compact dustproof weather resistant design optimized for outdoor shooting coldproof performance at temperatures down to 14F 10C Optical viewfinder with a glass pentaprism provides approximately 100 fieldofview and 095times magnification giving a large clear view of the subject for quick easy confirmation of focusing and framing Inbody SR Shake Reduction mechanism with a compensation effect of 45 shutter steps works effectively with all PENTAX interchangeable lenses By using the optional OGPS2 GPS unit with the KF automatic tracking of celestial bodies without an equatorial device is possible