I travel a bit for work and take pictures when I can. Mostly I've been concentrating on architectural images. Mostly I've been using my ex-McKillop Sigma DP1 Merrill, which has a fairly wide angle lens (19mm, which with the crop factor calculates to a roughly 28mm equivalent in full frame.) Lately I've been thinking about purchasing a used Sony a7 or a7R. Reasons: Size Lens interchangeability Full frame sensor I saw a thread today that Hamish posted a few years ago announcing his intent to go to Sony, so I'll probably reach out to him to get his experiences. But for now, does anyone on RPF have any experiences with the a7 series that they'd care to share?