The beauty of shooting with micro four thirds cameras is that the lenses are relatively small. So, one can carry a number of lenses in one's bag and not be burdened. I have only two lenses that are in the "pro" category, the Olympus 12-40mm, f/2.8 and the Olympus 60mm, f/2.8 Macro lenses. My widest lens is the little Olympus 9mm, f/8 body cap lens (BCL) and my lens with the longest "reach" is my Olympus 75-300mm, f/4-5.6 lens. The only Canon lens I kept was an old manual 50mm, f/1.8 that I can use on my two cameras using an adapter.