nd filter

Hi all I'm looking for individual ND filter ( not as a bundle) Where can I find only 16 or 32

Hi All, I just bought a stronger B & W 6 Stop ND filter for the Olympus 12mm and it is heavier than the last. The balance was out before switching on so I "blu-tacked" a 1p coin to the back of the X5 and a 2p coin to the side and it is balanced perfectly. Turns on and works ok but just...