The sony alpha a7s full frame digital camera combines a 122mp full frame cmos sensor with sonys powerful bionz x image processor to deliver unrivalled sensitivity and exceptional low light performance designed to meet the needs of the serious photographer and videographer the a7s s stands for sensitivity offers an iso range up to 102 400 which is expandable to 409 600 and the option to output 4k video to an optional recorder through its hdmi port without the need for line skipping or