Nice value. Comes in retail packaging

This K&F Concept wide-angle lens is a simple yet effective upgrade for the DJI Mavic 4 Pro, noticeably expanding the field of view to an impressive 108 degrees. The snap-on installation is quick and secure, maintaining full gimbal movement and working seamlessly with the original lens cover. Image quality remains excellent thanks to the multi-coated AGC optical glass, with no obvious distortion or color degradation. The CNC aluminum construction and built-in UV protection add a layer of confidence when flying in rugged or bright conditions. Overall, it is a high-quality accessory that delivers more dramatic, immersive landscape shots with minimal tradeoffs.

First off, this wide-angle lens does work as advertised. It provides a 108-degree field of view, which noticeably expands the stock field of view of the main 28mm Hasselblad lens on the DJI Mavic 4 Pro. If your goal is to capture more expansive landscapes or tighter environments, this lens definitely delivers a wider perspective.

Build quality is very good, as expected from K&F Concept. The lens snaps and locks into place securely, and once attached it feels solid and confidence-inspiring. I have no concerns about it popping off mid-flight, which is always a big consideration with drone accessories. All three lenses are covered and protected with this wide angle lens. The main one is the wide angle and the other two are covered by a single lower protective glass.

That said, there are a few drawbacks worth noting. There is visible vignetting when using this lens, which may require correction in post and could be a dealbreaker for some users who want clean, edge-to-edge footage straight out of camera.

Another annoyance is the attachment process. You must wait until the drone is powered on and the gimbal has completed its startup checks before attaching the lens. Personally, I don’t like handling or adding accessories to the gimbal after the drone is already on—it just feels like extra risk and another potential point of failure. If you try attaching the lens before powering on the drone, the gimbal will throw an error and won’t function properly with the lens attached.

Overall, this is a well-made wide-angle lens that genuinely expands your field of view, but the vignetting and less-than-ideal attachment workflow keep it from being a must-have accessory. Good results are possible, just be aware of the compromises.

Increased view. Don’t really notice any quality or resolution drop. It is a little heavy. So be aware of that when flying.
Only thing I don’t like is you have to install the lens AFTER drone has been started up, as gimble won’t cycle around with it on , it will hit drone.
Only other downside is if you record videos, you can’t use nd filters with it. But that’s obvious.

A large frame filter that fits securely. This is easy enough to install but will not work correctly if it's installed after the gimbal start up test. Mounting it after the self test will cause errors. There is a slight reduction in sharpness and increase in CA but the difference isn't noticeable except side by side especially the sharpness difference. I'd say the CA is worse than the small loss in sharpness. The corners have no blur issues. There is some flaring with a strong light source from angles to the side. This works both horizontally and vertically. Physically its build quality is very good. This does have glass to protect the tele lenses unlike others I have seen.

Wide-angle attachment lens that is specially designed for the DJI Mavic 4 Pro and is easy to attach with a magnet. In use, the significantly extended viewing angle stands out in particular, which is ideal for landscape and architectural photography. Compared to the standard lens, the image looks noticeably wider without restricting gimbal movement. The workmanship makes a high-quality impression and the assembly is quick, which is practical for changing shooting situations. As usual with wide-angle attachments, there may be slight distortions at the edges. Well suited for users who want to get more screen space from the same flight altitude, less for shooting with strict geometric precision.

When using the K&F Concept wide-angle lens, it's immediately apparent how cleanly the accessories are made: The glass looks high-quality, the frame is stable and the magnetic mount locks securely in place.
The effect in practice is clear — the field of vision expands noticeably and delivers impressively wide images without significantly sacrificing image quality.
The multi-coating is noticeable in strong light, and even after several flights, everything stays tight without slipping.
Not much can be said about long-term durability, but the solid workmanship makes a good impression. For the price, the lens offers real added value for Mavic 4 Pro pilots who want more creative freedom.

This wide angle helps with the fact that Mavic 4 has a 28mm wide which is less the my Mavic 3. So I missed the extra area for my code in building images. The lens is heavy and you have to out it on after the Mavic is ready to fly, otherwise you get a gimble fail at startup.

This ide-angle lens is a nice, simple upgrade accessory for the DJI Mavic 4 Pro. It greatly expands the field of view to 108 degrees. The lens appears to be solidly built and comes from a company known for its optics .In that vein, the lens is made from imported AGC optical glass and boasts a 28-layer multi-coating that helps repel water, dust, grease, and is anti-scratch.
Installation is a "snap" with the lens simply snapping on to the front of the Mavic's camera. The snap-on details are the same as for camera-mounted DJI filters and is quick (both on and off) and secure. lens kit is CNC aluminum construction, lending to a sense of quality.
Photos with/without the lens are dramatic given the side FOV the lens provides.