I hope this is the right place to post my question. Can anyone tell me if you have full function of the Olympus 70-300 f/4-5.6 four third lens on the Panasonic g5? Does it require a smart adapter to get auto focus etc.? Or will it mount directly to the g5?. Is it a decent lens for casual bird and wildlife photos? ( not BIF ). Thanks for your input. Jerry.