You could buy a step up adapter ring, which I did, to use a more common size such as 52mm. I have one on mine, but truthfully it makes this small compact camera lose some of its charm. I never had any flare problems with the RC, but I always observe my scene and check for possible sources, and try shading with a hand or book in dire circumstances. (its a bit tricky with a rangefinder) Truthfully I dont even use this camera that often, my finger always manages to get in a shot every 10 or some frames LOL