Dpreview tested the new Sony A7c and concluded:
The Sony a7C is gives up very little in the way of features in order to achieve its small size. Its image quality is very good and its AF is excellent, but its small viewfinder takes away from the experience a little. Its video and menus aren’t as polished as its rivals but its size and battery life make for a powerful combination.
The a7C’s appeal can really be summed-up in a single phrase: ‘full-frame image quality in a compact body’. When using the a7C it’s easy to forget the size of the sensor that Sony has packed inside it, and while there are frustrations (the viewfinder experience is adequate but not amazing, and I wish there was a front control dial) having this kind of quality in a genuinely small camera is extremely attractive.