GoPro Hero4 Black Test: a cam action towards the top of video quality

Here is a short test of the GoPro action camera Hero4 Black. The number 4 to 4K. But even without provision Ultra High Definition screen, this action worth seeing ... if you have the means. A big close detail ...
The previous version of GoPro, the Hero3 Black Edition + (tested here on HTO), I had named "transition cam action." She already recorded the video in 4K (ie a definition of 3840 × 2160 pixels, so 4 times that of Full HD). But his shooting rate was only 15 frames / sec. FYI, the new 4K TV is normally 60 frames / sec. This new GoPro camera Hero4 Black, the rate equal to 30 frames / sec. That's not bad. And should be sufficient in many cases, unless you want to shoot subjects moving very quickly. Mainly, it's the difference that therefore this Hero4 Black GoPro compared to the previous + GoPro Hero3 Black Edition. We will return low quality images.
Manufacturing
The GoPro Hero4 Black remains a small device. Weighing only 85 g. Its manufacture is neat. The quality is there. The protective casing provided with the basic product is designed to withstand a depth of 40 m. During the three weeks of the product ready, I could not test it in the water and at that depth.
1/Image quality
Let's talk about the quality of images. At the time of this loan GoPro Hero4 Black, I had other action cameras (EEA S71, 47018 Medion Life, AZ1 Sony, Kodak SP360). Well this GoPro Hero4 Black is just above the lot! Even if the comparison holds EEA S71 Full HD at 50 frames / sec, the Black Hero4 however recorded, in addition, 4K ... In short, this action cam offers the high-end image quality. Knowing that the 12-megapixel photos are not bad, either. I found this high level of quality at the sight of the return of details, herbs and branches, back from a forest in test output. Awesome.
2/Application
The GoPro App associated with this is also a success. Practice, it makes it more comfortable setting the parameters that the tiny laHero4 Black LCD. Obviously, again via WiFi, you can view the images. Bluetooth theoretically allows to combine accessories, but I have not had to test them. Besides thus the ergonomics of this app, it is worth noting an interesting function, ProTune. By activating the menu, it is possible to tweak certain settings. For example, the maximum ISO sensitivity automatically chosen by the program to adjust the exposure. Thus, for example by opting for a limit of 200 ISO can reduce image noise. You can also choose several color temperatures (warm 3000 kelvin cold 6500 kelvin) and modify the margins of exposure (from +2 to -2). This could prevent, on a snowy runway, underexposure. Autonomy In the previous test of the GoPro Hero3 + I already critiquai autonomy of the camera. In video recording, continuous and Full HD GoPro Hero4 Black reaches about that ... Against 1:35 1:28 for the EEA S71. 2:40 And for Kodak SP360, always in Full HD, but certainly a lesser quality. I remain critical on the autonomy of the new GoPro camera.Price 530€ .