making

I recently went to great lengths to solve a simple problem. I have a Manfrotto monopod that requires a little screw to attach my camera to the monopod. Without it, I can't use it. The screws are cheap and no big deal... but, they are too easy to lose.

Here's an interesting behind-the-scenes video series that shows the creation of a Canon 500mm f/4.0L IS lens. It's a neat look at the guts of glass, and an opportunity to see how exactly the various components of a lens are created and put together.