The Sony a7C II's advanced imaging system is powered by a 33MP full-frame Exmor R CMOS sensor and the BIONZ XR processor, a combination capable of 10-bit 4K imagery at up to 30 fps or a top continuous shooting rate of 10 fps with AF and AE using either the mechanical or electronic shutter. The introduction of the back-illuminated structure to the camera's sensor gives it a higher resolution without sacrificing sensitivity. With an ISO range of 100-51200 that's expandable to ISO 50-204800, the camera boasts low-light performance with minimal noise and wide dynamic range.