I use a Sony A7RII body, which has the advantage of having a veritable plethora of cheap Chinese adapters available. Certainly, when using automatic lenses, it is worth having a decent name-brand adapter such as Kipon or Metabones, but for vintage lenses, the cheap Chinese adapters generally work a treat. I have a number of focusing helicoids in various diameters for adapting lenses of all kinds. They come in various lengths and diameters of M42, M52, M58 and M65. To these one can add various adapter rings and clamps to secure lens barrels for projection lenses and the like. My favorites are the helicoid adapters for Nikon F, Canon EOS and M42 lenses, which, when fully retracted, allow for infinity focus, but which can be extended 20mm or so to provide continuous close focusing.