I've learned the ND filters that caused me to remove the lens cover from the Phantom did not work . Only because removing the lens cover is touchy. Mine came off very hard. Very hard to get back on correctly. Cracked the Phantom lens glass when trying to clean it ( very delicate). I sat at a table doing this, can't imagine trying this in the field. So now I have to find replacement glass lens and then I will order a ND filter that just pushes over the lens.