DJI Osmo Nano vs SJCAM C400
In short: The SJCAM C400 costs $50 less; the DJI Osmo Nano collects light over 72 mm² against 28, which is 2.6× the area; the DJI Osmo Nano is waterproof to 10 m bare and the SJCAM C400 is not waterproof on its own at all; only the DJI Osmo Nano has horizon lock; the DJI Osmo Nano records 10-bit colour; the SJCAM C400 claims 7 h 17 min at 4K30 with the 3000 mAh handle attached; 172 minutes on the 54 g camera alone.
| Spec | DJI Osmo Nano | SJCAM C400 |
|---|---|---|
| Approx. price | ~$299 | ~$249 |
| Year-one cost | ~$299 | ~$249 |
| Type | Compact / mini | Budget action |
| Sensor size | 1/1.3-inch | 1/2.3-inch |
| Sensor area | 72 mm² | 28 mm² |
| Max resolution | 4K @ 60fps | 4K @ 30fps |
| Reframed resolution | n/a — already flat | n/a — already flat |
| Max fps at 4K | 120 | 30 |
| Max fps at 1080p | 240 | 120 |
| Max bitrate | 120 Mbps | Not published |
| Colour depth | 10-bit | Not published |
| Log profile | D-Log M | None |
| Stabilisation | RockSteady 3.0 | 6-axis gyro EIS |
| Horizon lock | 45° (lean only) | None |
| Aperture | f/2.8 | Not published |
| Waterproof | 10 m bare | 30 m in the case only |
| Claimed runtime | 3 h 20 min at 1080p24 with RockSteady on and Wi-Fi off, camera plus Vision Dock | 7 h 17 min at 4K30 with the 3000 mAh handle attached; 172 minutes on the 54 g camera alone |
| Tested runtime | No third-party test collected | No third-party test collected |
| Battery | 530 mAh | 1250 mAh |
| Cold rating | -4°F | — |
| Weight | 52 g | 54 g |
| Screens | 1.96-inch OLED touch on the Vision Dock | Rotating screen on the handle |
| Mount | Magnetic pendant + magnetic quick-release | GoPro folding fingers |
| Replaceable lenses | No | No |
| GPS | No | No |
| Voice control | Yes | No |
| Storage | 64 GB or 128 GB internal + microSD via dock | microSD |
| Subscription | None | None |
| Released | 2025 | 2025 |
A highlighted cell is the outright better figure in that row, and only where one direction is unambiguously better. Weight, field of view and battery capacity are left neutral because the better direction depends entirely on what you are shooting.
Strengths and drawbacks
DJI Osmo Nano
- +Same sensor area as DJI's full-size action cameras in a third of the weight
- +10-bit D-Log M on a camera this small is unique here
- +Records with the dock detached, so the screen is optional weight
- +Internal storage as standard — there is no card to forget
- +Waterproof to 10 m bare, which the Insta360 GO Ultra is not
- −HorizonBalancing only corrects tilt; there is no full 360° horizon lock
- −The module alone runs about 90 minutes — the 200-minute figure needs the dock attached
- −Magnetic pendant mounting is not something to trust at speed without the safety cord
- −The dock is splash-resistant only, so the screen cannot come swimming
- −Two pieces to charge, carry and keep track of, and the useful battery figure needs both
SJCAM C400
- +Over seven hours at 4K30 with the handle, the longest figure in this catalogue
- +54 g module is lighter than a GoPro HERO and close to an Insta360 GO 3S
- +Rotating screen makes it usable for talking to camera
- +Half the price of the DJI Osmo Nano and Insta360 GO Ultra it copies
- +The camera module drops into the handle without a cable, so the changeover takes seconds
- −1/2.3-inch sensor — roughly a quarter of the Osmo Nano's imaging area
- −No bare waterproofing at all
- −4K30 only, no horizon lock, no log profile
- −The module has no screen of its own; framing needs the handle