Sony's a7R series has long been respected for offering extremely high levels of resolution (the highest available in a full frame camera, in fact), along with a range of advanced features that make it the workhorse of choice for a wide range of applications. Now in its fifth generation, the a7R is quite refined and can satisfy the needs of many users. This great video review takes a look at the camera and the sort of performance and image quality you can expect from it in practice.