I am going on a trip either to Europe or Austrailia. I was wondering what the best lens to get for this trip. I can only afford one at the time and need advice. I do not take many family photos but i do take photos of scenery, wildlife and food. I was thinking a fast prime lens would be good for me. the 20mm lens is a fast choice i believe and will be good for indoor photos and scenery photos. Does anyone have any advice on what the best lens to get for micro four thirds?