DJI has just released the Osmo Nano, a tiny, thumb-sized action camera capable of 4K videos. On paper, it sounds like a dream for FPV pilots — lightweight, compact, and powerful. But how does it actually compare to cameras like the DJI O4 Pro Air Unit? In this review, I’ll go through its strengths and weaknesses as an FPV action camera, and where it fits into your setup.
Learn more about action cameras for FPV drones in our buyer’s guide: https://oscarliang.com/action-camera/
Where to Buy
Get the DJI Osmo Nano camera from:
Design and Features
The DJI Osmo Nano is incredibly small — about the size of your thumb — and weighs only 52 grams. It’s designed as an all-in-one camera, with no removable battery or SD card slot. Instead, it relies on a dock module that handles charging, data transfer via USB-C, and includes a microSD slot for external storage. The dock also features a touchscreen, allowing you to watch footage directly. The overall concept is similar to the Insta360 GO 3 we reviewed a couple of years ago.
DJI offers two versions, 64GB and 128GB. For only US$30 difference I think it’s worth it to get the 128GB option- you’ll need the extra storage for 4K footage, and it saves the hassle of constantly offloading files.
The Osmo Nano itself doesn’t have a built-in screen, which helps keep the camera compact and lightweight. However, this also means you can’t view recording status or adjust settings directly on the camera. Instead, you’ll need to use either the dock’s touchscreen or the DJI Mimo app on your smartphone (connected via Wi-Fi) to change modes and settings.
Apart from 4K resolution, the camera supports D-Log M color mode for better post-processing flexibility, and footage can be stabilized using Gyroflow or DJI’s built-in Rocksteady stabilization.
Another great touch — the lens is removable, allowing you to swap it out for ND filter to achieve smoother, more cinematic footage and added protection during flights.
Image Quality: DJI Osmo Nano vs O3 and O4 Pro
Let’s get to the big question — how does the DJI Osmo Nano compare to DJI’s FPV systems?
Against the DJI O3 Air Unit
The Osmo Nano is a noticeable improvement over the O3. It handles exposure and highlights better, the image is cleaner, and better color grading results. The O3 often struggles with bright light transitions and crushed blacks — something the Nano handles gracefully. For FPV pilots still flying O3 or older analog systems, this is a major step up in video quality.
Against the DJI O4 Pro
Overall, the Osmo Nano’s footage quality rivals the DJI O4 Pro, delivering rich colors, stable 4K footage and impressive dynamic range. The color reproduction is close between the two, though the O4 Pro remains slightly sharper with a wider field of view (FOV). The difference is subtle unless you zoom in and compare side by side.
If your drone already uses a DJI O4 Pro Air Unit, adding an Osmo Nano isn’t really necessary — you will get quite similar quality footage from these cameras, so would even argue the O4 Pro footage look slightly better. However, for drones that don’t have HD recording capability, such as analog system, the Osmo Nano is a great lightweight action camera.
Performance and Recording Modes
The DJI Osmo Nano supports 4K at 120fps and uses the same image processor as the Action 5. It offers both normal bitrate mode (60–80 Mbps) and high bitrate mode (110 Mbps). Most people would be happy with normal bitrate, but high bitrate provides slightly more fine detail — though it also makes the camera run warmer and videos take up more space.
Thermal testing showed that the Nano does get warm, especially in high bitrate mode. When mounted on a drone, it benefits from airflow, so it’s usually fine during flight. However, if you live in a hot climate, you may want to keep an eye on temperatures, as overheating could cause early thermal shutdowns.
In 4K normal bitrate mode, you can expect about 20 to 25 minutes of continuous recording time per charge. While that’s not enough for an entire day of flying, you can put the camera back in the dock for a quick charge between battery change.
Using the Osmo Nano on FPV Drones
The DJI Osmo Nano is marketed as a wearable action camera, but as FPV pilots, the question we all want answered is: is it a good FPV drone camera?
Unlike cameras integrated into FPV systems such as the DJI O4 Pro, the Osmo Nano records independently. This means its recording settings don’t interfere with your FPV feed — for instance, you can record in 4K 30fps with a fixed ISO for better image quality, while keeping your DJI FPV system set to 100fps with dynamic ISO for minimal latency and optimal exposure during flight. And even if your drone loses signal or power mid-flight, the Nano continues recording without interruption.
This independence is a huge advantage, especially for pilots flying FPV systems with low onboard recording quality, such as analog or HDZero. It also makes the Nano incredibly versatile — you can easily move it to a different drone, giving every rig high-quality 4K recording capability without any rewiring or configuration changes.
It uses the same magnetic mounting system as the DJI Action 4 and Action 5, so if you already use those cameras, mounting the Nano is effortless.
However, there are some trade-offs:
- It’s one more device you must remember to charge.
- Unlike the O4 Pro, you can’t see its recording status or remaining recording storage through your FPV goggles.
- It adds another 50 grams to your drone — which reduces flight time and performance.
- That extra weight won’t matter much on larger quads, but on smaller cinewhoops, it’s significant.
Final Thoughts – Should You Buy It?
The DJI Osmo Nano feels like a mini version of the Action 5 — familiar in interface, shooting modes, and overall usability.
It’s a great alternative to the DJI Action 2, as well as other thumb-sized cameras like the Insta360 GO 2 and GO 3, Hawkeye Thumb, and RunCam Thumb. For FPV pilots who want to reduce weight, fly smaller rigs, or upgrade from older analog setups, the Osmo Nano strikes a sweet balance between performance, image quality, and portability.
However, if your drone already has the DJI O4 Pro Air Unit, for most people there’s little need to use it — the O4 Pro already offers the same level of image quality, if not even slightly better. But if you’re flying anything else and want cinematic 4K video from a lightweight, self-contained camera, the DJI Osmo Nano is absolutely worth considering.
