Pentax Spotmeter V

My newest photographic tool, the legendary Pentax Spotmeter V. Ansel Adams used one of these, before the digital version came out. The reason I didn't get the digital? It is more than twice as much, but I would love to have gotten one.

I'm getting kind of obsessed with shooting my stuff studio-style against a white paper backdrop.
I am using a simple set up, I just tape a piece of white paper to the blinds on my window and curve the bottom of it under another sheet on top of my desk, pulled away from the blinds as far as I can to keep the lines from the blinds showing up. My desk is right next to the window. I love ambient light! I don't like using flash unless absolutely necessary.