I'm interested in what level ND filters you have - 2, 3, 4 stops?I recently purchased some -3 stop ND Gel material and setup my CNC machine with a drag knife and cut a filter to fit exactly into the removable lens cover that is on the Phantom 3.
It is raining here at the moment so have not had a chance to take it out for a test but will post comparison pictures here when i am able....
For now here are some pics of the filter and of it installed on my camera....
How can I contact you?
[email protected]