The Pentax K-1 Mark Ii, the new flagship of the acclaimed Pentax K-series lineup, delivers outstanding image quality and improved operability in a broad range of shooting conditions. It features a full-frame Anti-aliasing (Aa)-filter less Cmos sensor with 36.4 effective megapixel resolution. An new accelerator unit that-along with the camera's Prime Iv image processor-enables it to produce high-resolution images with minimal noise in even in the most challenging low-light conditions, up to Iso 819200.The K-1 Mark Ii incorporates Pixel Shift Resolution System Ii. This new, Pentax-developed technology uses the same in-camera shake-reduction (Sr) mechanism and sensor-shift capabilities as the original Pixel Shift Resolution System, capturing four images of the same scene, and then synthesizes them into a single, super-high-resolution composite image.