Our latest video review is up, focusing on the brand new Samsung Galaxy S7. But what's more interesting is that we shot it entirely on a second Samsung Galaxy S7. And it turned out great - so here's why the Galaxy S7 is a superb videography tool that can even fill in for real work tasks. The Samsung Galaxy S7 isn't the only phone that can record excellent video quality but it is the only one with an aperture as wide as f/1.7, which allows to keep the ISO as low as possible. While we mostly filmed the video review by using manual focus we did use Samsung's Dual Pixel technology...
Source: http://www.gsmarena.com/the_galaxy_s7_video_review_shot_entirely_on_the_galaxy_s7_itself-news-17282.php