Boasting a resolution of 26.1MP, the sensor uses a unique color filter array, synonymous to X-Trans CMOS sensors, to control moiré and false color without the use of an optical low-pass filter. Its back-illuminated structure enhances image quality while maintaining a high S/N ratio. Furthermore, the sensor is equipped with 2.16M phase detection AF pixels covering approx. 100% of the frame which supports high autofocus performance regardless of where the subject is located within the frame. X-Processor 4, the latest version of X Series’ image processing engine, combined with the latest algorithm, enhances the Film Simulation modes, substantially improving the camera’s ability to track moving subjects, boosts AF’s speed and accuracy, and allows for a more diverse range of video functions. It maximizes the full potential of X-Trans CMOS 4 sensor to deliver the highest performance in all aspects in the history of X Series. With its X-Trans CMOS 4 sensor and X Processor 4 image processing engine combining to produce best-in-class autofocus performance, the X-E4 offers AF speed equivalent to that of other high-performance X Series Mirrorless Cameras (X-T4, X-Pro3), reaching an incredible 0.02 secs. No matter the situation, X-E4’s AF can track and hold the most difficult of moving subjects with tenacious speed, or lock onto an individual’s face with wonderfully intelligent anticipation.