Can anyone help me identify where these are from? They are glass and aluminum nd filters in a wood box that I purchased for my phantom 3 pro in 2015 or 2016 and I cant remember where and who I bought them from. I know I watched a video on you tube in order to place the zinc weights on the camera to offset the weight added from the barrel,  lens,  and o-ring. They are of outstanding quality were a very limited production and I believe from Europe.  Any help would be appreciated!

Can you make a straight top down picture from the logo?
Maybe that will be recognized by Google lens.

Montfrooij Posted at 6-25 12:16
Can you make a straight top down picture from the logo?
Maybe that will be recognized by Google lens.

fans8a5c68fd Posted at 6-25 14:13

It's a common logo apparently, but I can't find anything ND filters related.