If you’re flying the DJI O4 Pro Air Unit on a custom-built FPV drone, the BetaFPV ND Filter Set is a solid choice for improving your footage and protecting your lens—without breaking the bank. In this review let’s break down the pros and cons of these filters from BetaFPV and how they compared to the official ones from DJI.
ND filters reduce the amount of light hitting your camera sensor, helping you maintain cinematic motion blur by keeping your shutter speed low. If you’re new to ND filters, check out this tutorial on how to use them effectively: https://oscarliang.com/nd-filter-fpv/
Where to Buy
Get the Betaflight ND filters from:
BetaFPV offers a filter kit that includes UV, ND8, ND16, and ND32 filters for the O4 Pro camera. You can also buy each filter individually for $5.99, which is great if you frequently use one specific ND strength and happen to lose or damage it. This flexibility makes BetaFPV’s filters one of the most affordable and convenient options currently available.
The included UV filter doesn’t affect exposure but acts as a great lens protector when an ND filter isn’t necessary. Learn more about these different types of filters: https://oscarliang.com/uv-cpl-nd-filters/
BetaFPV vs DJI Filters
One of the standout advantages of the BetaFPV ND filters is their low profile.
While DJI’s official ND filters are well-designed and work perfectly on the Avata 2, they can be too wide for many custom FPV drone frames.
Here’s the DJI filter on the Avata 2:
Here’s the DJI filter on an FPV drone (cinelog30 v3, too wide to fit):
The BetaFPV filters, by contrast, fit snugly on nearly any frame and still work well on the Avata 2—a win-win for versatility.
In terms of usability, DJI filters are easier to mount and remove thanks to their top and bottom pinch tabs. However, they’re also more prone to falling off in crashes or even transportation. BetaFPV filters attach more securely, but you’ll need to push them directly onto the lens, which can make installation and removal a bit more challenging. In some cases, I’ve had to hold the camera housing down while working on the filter.
Any Downsides?
The main caveat with the BetaFPV filters is the black corners in video due to the extremely wide FOV of the DJI O4 Pro camera. However, in practice, this is not really an issue in my opinion. Firstly, the black corners are minimal so they don’t actually affect flying. Secondly, with recording video, we almost always apply stabilization using Gyroflow or RockSteady, the image will get cropped slightly, which generally eliminates the dark corners.
Final Thoughts
If you want an affordable, compact, and functional set of ND filters for your DJI O4 Pro camera or Avata 2, the BetaFPV ND filter set is a great buy. The black corners is a minor trade-off for better compatibility and secure mounting. Plus, at just $5.99 per filter, there’s little reason not to stock up.
Pros:
- Low profile – supports a wide range of frames
- Inexpensive ($5.99 per filter, or $19.99 for 4)
- Compatible with DJI O4 Pro and Avata 2
- UV filter included as lens protector
- Secure fit; less likely to fall off in crashes
Cons:
- Harder to install and remove
- Minor black corners due to wide camera FOV
If you’re looking to step up your video quality or just want basic lens protection for your O4 Pro, BetaFPV’s ND filters deliver excellent value and practical performance.