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)-filterless 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. With the Pixel Shift Resolution System II, the camera also obtains RGB colour data, resulting in images with significantly finer details and truer colours than those produced by typical full-frame sensors. In addition, the new Dynamic Pixel Shift Resolution mode allows photographers to produce crisp, ultra-high pixel shift resolution images without the need of a tripod. The PENTAX K-1 Mark II also comes equipped with many unique features and functions designed to facilitate creativity and ensure operational comfort, including a sturdy magnesium-alloy body with dustproof, weather-resistant construction; an optical viewfinder with a nearly 100-percent field of view for real-time subject confirmation; Astro Tracer, which simplifies the tracing and photographing of celestial bodies; and a flexible tilt-type LCD monitor to accommodate various shooting angles.