Please pardon me if this is a stupid question or has already been posted....I didn't see it when I looked. I just ordered the f/1.8 50mm lens and i'm excited to use it because of its sharpness and huge aperture. But I'm wondering if there is any way to put a converter, or a filter, on it to allow it to shoot more macro-type shots. (I don't need to get ridiculously close, but I'd love to get close!) I saw some filters that refocus the lens to farther and nearer distances, like filters called +1, +3, +4 etc. that seem to just be magnifiers. Does anyone know if there's something that would cooperate with the 50mm to produce nice quality close-ups? Thanks!