The a one is a small mirroless camera about the size of a seven s three, fifty mega pic censor. The big downside is, well, we don't know the thermal situation,. How long will it shoot? Eih k, will it overheat? I don't know. Number two, no articulating elsied screen. It's just plaster to the back. Doesn't tilt, doesn't swivel, doesn't flip. But people just like seeing the bigger to you get that really sharp, high quality....