I use the MP's own framelines, not an external finder.
telenous (thanks, btw) - I was actually standing on the top rail of a wobbly fence to get the perspective I wanted, so my lens was probably 10 feet from the model's face. I could have gotten closer, but the window was above and behind me, so the best light was from this direction - if I'd gotten closer the light wouldn't have been as good. I had to brace myself on a roof beam, which, it turned out, was also supporting a number of spiders.