I've just received a 62mm HMC FLD Hoya filter with a 55/62 conversion ring, and a 55mm non HMC FLD Hoya to use with my panasonic pe100. Long story as to why I've ended up with both options but essentially the HMC 55 I ordered turned out to be unavailable. I'm having trouble fitting either of these setups to my projector - neither has thread long enough to take on the threaded section of the focus ring. I've read about putting some tape around the 55mm filter, is the idea to make it a push fit into the ring? The opening of my focus ring has a sloping inner edge, will this grip? Maybe someone has some photos they can point me to? Ideally I'd like to be able to use the HMC setup with the adaptor ring, anyone else using a step-up ring with this projector? Thanks Duncan.