I had a light meter when I was first taking pictures seriously, but I pretty much started leaving it behind immediately. I think it would be a great tool to have handy AFTER I become a master of the force, but I see so many students use it as a crutch I just don’t really worry about it yet.

So far the emperical method has worked well!

I thought as I was doing it what Matt Callow is thinking: it would be nice to have something like this for pinhole cameras. The various crib sheets on the web are all very well, but are not as elegant as this.