i suggest using bhphoto.com to get your lenses and such. they have accessories for all types of cameras. there is a used section where i got a $200 macro set for my semipro camera (a camera something like yours where it has a fixed lens and you can get things to attach to it). it also has cheap stuff for the pro cameras as well. you should REALLY check it out, they have GREAT stuff.
good luck!
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