Variable ND Filter with Lens Hood for DJI Phantom 4

Variable ND Filter using cheap PL Film.

## IMPORTANT ##
This lens hood doesn't support following two resolutions.
(The part of the lens hood comes out in a picture by these setting.)
* 4:3 resolution in Photo Mode
* 4096 x 2160 in Movie Mode

To make this, you need...
* PL Film square-cut 31mm x 31mm
* PL Film circle-cut Diameter 35mm
* M2 x 6mm Screw x 4
* Rubber band x 2
* A lead board of 18g (as a balance weight)
* Glue (To glue ring A and ring B together.)

This lens