I just have a chance to go to San Francisco for business in April, then took a little trip to Yosemite. I wanted to travel light this time, so took only Olympus EM-1 and the only lens 12-40 f/2.8, few filters and a small tripod. The weather was not so nice a lot of time, even light rain, but EM-1 handled them really fine. Some scenic stops, my camera was the smallest camera out there. Most of them were full frame, even medium format!! In the term of walking around and hiking, it's like heaven .... soooo like, I was happy to sell my Full Frame for m4/3 system. P.S. Sorry for my poor English.