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Back-illuminated 24.2MP full-frame sensor - The 35mm full-frame Exmor R CMOS image sensor features 24.2-megapixel resolution, back illumination, and gapless on-chip lens design for extraordinary sensitivity and dynamic range. Two times faster12 data readout speed is achieved through copper wires and front-end LSI. Entirely enhanced image processing system - A combination of new-generation image processing system and a new sensor achieves an up to 1.5-stop improvement in image quality. Wider, faster, more steadfast AF performance - An evolved image processing system and α9 camera AF algorithms optimised for the α7 III improve AF speed, precision, and tracking performance. Focal-plane phase-detection AF supports A-mount lenses - Phase-detection AF can operate even when an A-mount lens18 is mounted to the α7 III via an LA-EA3 adaptor. The 693-point focal-plane phase-detection AF system provides wide-area coverage, fast response, and high-performance tracking.