For the past few years, Austin Mann’s iPhone camera reviews have been at the top of my list of articles I want to read whenever a new iPhone is released. This year, Austin went to Switzerland to test the iPhone 6s and 6s Plus, with some impressive results.

Today, he posted a behind the scenes video that is possibly even more fascinating than the photos themselves as you can see how everything was made and, more importantly, where. Pretty amazing to see what Austin and his team go through to make their reviews possible. The video is 17 minutes long, but worth watching until the end.