After being inspired by some photos on the forum, I've been hunting for a heavy ND filter, 9-10 stop preferably, to use with my OM-D and probably panny 25mm. Keen in screw ins rather than slide ins. There is virtually nothing in the uk available! Noone has the heliopan 10 stop (teamwork digital don't actually have stock), there is an 8 week wait on the b&w 10 stop (and I hear it colour casts a little). The only option open to me seems to be the hoya NDx400 with a 46-49mm step up ring. Anyone else from the uk have any better ideas?? I CAN'T WAIT MUCH LONGER TO TRY MISTY WATER PICTURES AND GHOSTING EFFECTS!