Converting Used Canon FD lenses for E420

ebay or cameta, b+h photo, adorama or local craig's list (don't know where are you from), flea markets, thrift shops, local camera shops

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my gear:
E-M5+45mm/1.8
E-520+12-60+14-42+70-300+Sigma 105 + FL-50R+EC20 + SRF-11
and good amount of legacy lenses (list in profile)