The F3 Filter Frame is made to fit any diameter magBox Q3 Lens Ring and will create a tool-less way to attach and swap filters when size and weight is of the essence. 

The magBox system is designed to do away with the need for sticky stuff or tape to attach filters when flying cinema prime lenses on drones. It will work as a replacement for a matte box when shooting inside cars or any tight location. The magBox system allows quick filter changes without leaving sticky glue on filters. It also allows you to securely stack filters with ease. As many as you dare!

We recommend having one filter frame for each filter in your kit. That way filter changes will be as quick as possible. This also removes the need to handle the filters and leaving fingermarks on the glass. 

Magnets are a key feature of the magBox. They're the reason you'll be able to make the fastest filter changes of you life! They're also the reason why the magBox has so few parts. Their technical term is neodyme magnets. Each one will hold 1.3 kilos of weight. To make absolutely sure your precious filters don't fall off we've put four of them on every one of our parts. If you still want to add some extra security there are holes next to the magnets for a security wire.

Choose your filter size when ordering. The F3 Filter Frames have the same outer dimensions for both 4x4” and 4x5.65” filters. This means you can use them with the same Q3 lens ring and you can stack 4x4” and 4x5.65” filters any way you like.

F3 frames fit any Q3 ring. 

Weight: 31g (F3-4x5.65)
Weight with filter: 137g (TrueND)