When I made my switch to a micro four-thirds camera system, all of my lens filter threads were significantly smaller than what I was used to. None of my filters fit any of my new lenses. But instead of buying up new lenses, I simply bought step-up adapter rings for them. It allowed me to keep the 82mm circular filters I had and use them on my new camera equipment, which had 52mm and 72mm filter thread sizes. … [Read more...] about Quick Tip: Don’t Toss Those Old Filters; Get Adapters!