Action cameras age unusually well. They are built to do one thing — capture stable, wide, durable footage — and that job does not change much between generations. Which is why the DJI Osmo Action 4, two generations old and priced accordingly, is currently one of the best deals in cameras.
The sensor that made it matter
When it launched, the Action 4’s headline was its 1/1.3-inch sensor, notably larger than the chips in competing action cameras. Bigger sensor, more light, cleaner footage when conditions get difficult — dusk rides, overcast coastlines, indoor sports halls. That advantage has not evaporated simply because newer cameras exist.
Footage tops out at 4K/120, which covers both sharp standard capture and four-times slow motion, and RockSteady stabilisation keeps mounted shots level and watchable.
Built for water
Waterproofing to 18m without a housing remains genuinely class-leading. Most rivals sit at 10m or less. If you swim, surf, kayak or snorkel, that margin means you stop thinking about the camera entirely, which is exactly what you want when you are concentrating on not drowning.
Magnetic mounting
DJI’s magnetic quick-release is the small design decision users notice most. Instead of fiddling with folding fingers and a thumbscrew, the camera clicks on and locks. In gloves, in the cold, halfway up something — it is meaningfully faster, and the latch is secure.
What you give up by not buying newer
The Action 5 Pro adds internal storage, OLED screens and deeper waterproofing. The Action 6 adds a variable aperture and a larger square sensor. Both are better cameras. Neither is better value, and the gap in everyday footage is smaller than the specification sheets imply.
Who should buy it
Anyone who wants a serious action camera without flagship pricing: cyclists, swimmers, skiers, parents at sports days, travellers. Buy the Standard Combo if you already have mounts and power; buy the Adventure Combo if you shoot all day, because spare batteries and the charging case cost more separately.
