I wanted to combine several interests and acquire something like the Sony QX or Olympus AIR, which have lens mounts, with a computer based program and display (

I wanted to combine several interests and acquire something like the Sony QX or Olympus AIR, which have lens mounts, with a computer based program and display (OLED eventually) for capturing night skies (and general exposure exploration). But I found none of the available systems have much versatility. Is there any affordable system useful for this purpose? I know some SLRs and high end 4/3 cameras have APIs, and hacker oriented devices like the PI's camera have potential.