Sony Alpha A7S Mark II Full Review
At the "core" of the Sony Alpha A7S Mark II is the same full-frame 12 megapixel CMOS sensor from the A7S, which offers an extended ISO range of ISO50 up to ISO409,600 (Native ISO100 to ISO102,400).
Improved handling and design; Excellent image quality; Excellent ISO range; 4K video can be recorded internally; MicroUSB charging / power; 5-axis image stabilisation; Wi-Fi and NFC; Sony PlayMemories Apps; Dual-axis electronic level
12 megapixels may not be enough for stills photographers; Camera video fussy about memory cards; Shorter battery life than previous model; Focus struggled in low-light at times