I never quite "got" the point of TTV, or "through the viewfinder" photography. Why not just... load it with film and shoot with the actual camera?! My Lubitel-2 does indeed have film in it (albeit.... crappy Shanghai film, but film nonetheless), but alas, here's a TTV shot.
Taken with a Nikon D300, Nikkor AF-S Micro 60mm f/2.8G ED