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Verdict
The GoPro Hero6 Black instantly becomes the best action camera you can buy based on the specs. 4K at 60fps and super-slow-motion 240fps at 1080p footage in such a small, versatile action camera make it a cinematic marvel.
At $500 / £500 / AU$750, though, the Hero6 Black is $100 / £100 more than its now reduced-in-price predecessor, the Hero5 Black. And that's before you factor in all of the mount accessories you'll want to buy.
Is slow-motion video worth the extra money? No, not for most people. But everyone will be able to take advantage of the improved image stabilization, wider dynamic range and better low-light performance, while the faster transfer speeds and small file sizes are a good universal perk as well. Those things are worth the step up in price, even if everything looks the same on the outside.
Competition
GoPro Hero5 Black
It may have been replaced by the Hero6 Black, but if you don't need the improved image stabilization and higher frame rates, along with the other improvements and tweaks, the Hero5 Black is still an excellent action camera. It's some $100/£100 cheaper as well, making it even more tempting.
Read our in-depth GoPro Hero5 Black review
GoPro Hero5 Session
The Hero5 Session borrows many elements from its bigger Hero5 Black brother, but with a scaled-down simplicity and exterior packaging. The slightly confusing one-button interface might not be for everyone, but the beautifully crisp 4K footage easily makes up for this.
Read our in-depth GoPro Hero5 Session review
Yi 4K Action Camera
Can YI Technology's latest challenge GoPro? This well-constructed POV cam shoots 4K 30fps video and 12MP stills, yet has a bigger touchscreen and a lower price than either the Hero5 Black or Hero6 Black. There's no voice control or waterproofing, but aside from that the YI 4K is a polished performer, and terrific value.
Read our in-depth Yi 4K Action Camera review
Phil Hall is an experienced writer and editor having worked on some of the largest photography magazines in the UK, and now edit the photography channel of TechRadar, the UK's biggest tech website and one of the largest in the world. He has also worked on numerous commercial projects, including working with manufacturers like Nikon and Fujifilm on bespoke printed and online camera guides, as well as writing technique blogs and copy for the John Lewis Technology guide.