The K-1’s new full frame 36.4 MP effective CMOS sensor isn’t just another full frame sensor. The K-1 is engineered to incorporate all of the performance requirements of high resolution full frame 35mm digital photography, adding PENTAX unique performance features and characteristics. An improved noise processing algorithm provides unprecedented performance in shadows or low light shooting where high ISO settings are critical for good performance. With the highest ISO in it’s class, the K-1 has achieved a staggering sensitivity range of up to ISO 204,800. This is attributable to a combination of the new large pixel, full frame sensor that has high noise resistance, and the new PRIME IV processor. Newly developed 5-axis SR II system covers the shake of yaw, pitch, roll, vertical, and horizontal motion of the camera. Shake reduction performance is improved to 5 shutter steps of compensation effect. Since SR is built-in to the K-1 body, it’s operation works with every K-mount lens. Combining both the K-1’s SR mechanism and the GPS feature, Astro Tracer easily tracks and photographs astronomical objects. By using movement of the image sensor during image exposure, the K-1 sensor generates the same level of moiré-reduction effect as optical AA (anti-aliasing) filter, without the softening effect. Unlike fixed optical AA filters, this allows the user to adjust the level of the moiré-reduction effect from OFF, Type1 and Type2. Bracketing of these settings is also available. For quick and easy operation in dark situations, the K-1 has new operation assist lighting placed in strategic locations on the body of the camera. The K-1 is carefully sealed in 87 different places for durable usage under harsh weather conditions. Get the shot anywhere, from any position, using the extremely nimble and flexible Cross-Tilt display. Shoot from the ground up, over the crowd, and around the corner, with extreme agility not found in other full frame offerings.