I have a Sony Nex-5 (about 2 years old). The sensor is the same as Sony's DSLR (APS-c), but this a a mirrorless camera, so much smaller. Its the size of the 4/3 cameras, but has a much bigger sensor. interchangeable lenses, all kinds of features, and is fairly small with the kit lens (a zoom). It fits into a smaller bag which I keep strapped to the handlebar. I really like the size and all the features, though there are not a lot of lens choices.