The DJI Osmo Action is a portable, well-built camera designed for action video. The manufacturer says it's waterproof, though we don't currently test for this, and you can easily mount it on a helmet rig or chest mount to shoot footage. It's compatible with the DJI Mimo app, too, so you can control all of the camera's functions through your smartphone. While video quality in 4k and FHD isn't the most impressive, it has a great video stabilization performance, which helps smooth out camera shake in your footage.
The DJI Osmo Action is middling for travel photography. It isn't intended to be used for this, and it lacks an autofocus system to help you track moving subjects. Also, its minimum shutter speed performance is poor, so you don't have a lot of flexibility when shooting in low-light situations. That said, it's very portable, and it offers good image quality, so your photos are pretty sharp and detailed.
The DJI Osmo Action is decent for landscape photography, though it's not intended for this use. This well-built, portable camera offers good image quality, and its screen is bright enough to be readable in direct sunlight. However, it doesn't have an autofocus system to help track moving subjects, and it isn't meant to be used handheld, which can be inconvenient. You also can't switch out its lens since it's built into the camera.
The DJI Osmo Action is sub-par for sport and wildlife photography. It isn't really designed for this use, and it doesn't have an autofocus system to help track fast-moving subjects. In burst mode, it has a continuous shooting speed of just seven frames per second, which is disappointing if you're looking to freeze the action of moving subjects. That said, its image quality is good, resulting in pretty clear and sharp images.
The DJI Osmo Action is decent for vlogging. It has a portable design and an impressive video stabilization performance to help smooth out camera shake if you record while walking. There's also a second screen at the front of the camera that's designed to help you see yourself while you record, which is nice. Unfortunately, its video quality isn't very impressive, so your footage may not appear very sharp or detailed.
The DJI Osmo Action is middling for studio video, though it isn't really intended for this use. Video quality is mediocre in 4k and middling in FHD, resulting in footage that isn't very sharp or detailed. It also lacks a video autofocus function to help track moving subjects, and it doesn't have a lot of inputs for videography accessories like headphones or a microphone. That said, its menu system is pretty easy to use, though it's easy to accidentally make an input on the main touchscreen, so you may want to use the DJI Mimo app on your smartphone instead.
The DJI Osmo Action is excellent for action video. This portable camera can easily be mounted on a helmet rig, and the manufacturer claims it's waterproof, though we don't test for this. Its impressive video stabilization performance can help to smooth out camera shake. It also has a lot of frame rate options in FHD, so it's suitable for filming slow-motion video. That said, video quality in 4k and FHD isn't the most impressive, so your footage may not be very sharp or detailed.
Update 10/14/2021: Added additional information about the camera's second front-facing screen.
This camera has an additional screen on the front that can be used for Live View while recording and also displays information like shooting mode, remaining battery life, and SD card info.
Update 10/06/2021: Corrected 'Clean HDMI Output' and 'Advertised Max Chroma Sampling Over HDMI' fields from 'Not advertised' to 'No HDMI'.
The DJI Osmo Action is available in 'Gray/Black', and you can see the label for the model we tested here.
If you come across another version, let us know in the discussions so we can update our review.