a7R II Review: vs 5DS-R, D810, GH4, a7 II & a7S

More detail and a correction in Part 2: We review the new Sony a7R II () and its 4k video against the GH4 () and a7S () with an Atomos Shogun (). We compare the a7R II’s 42-megapixel sensor against the Canon 5DS-R () and Nikon D810 (). We also test the improved autofocusing to see if it can match similarly priced DSLRs, using both native Sony lenses and Canon lenses adap