I'm thinking of buying the fast Nikon 50mm f1.4G prime as I will be making the switch to a Full Frame system in the next 12 months but in the meantime I would like to be able to use this on my Oly E620 Body. I have found Nikon Lens to Olympus 4/3 body on Ebay for about $20 - 2 types: one without AF and one that beeps when in focus. Has anybody used these or heard if these adapters work ok, or could this damage the E620 body in any way???