aperture

Make a Pair of Paper Aperture Glasses

Instructables user art.makes has a tutorial on how you can make a pair of paper iris glasses with adjustable apertures. You could definitely build upon the idea to make each side more like a camera lens (e.g. adding barrels, f-stop values) -- perhaps as part of a geeky Halloween costume?

Biology for Photographers: Why is the Aperture Scale Logarithmic?

One of the main stumbling points for new photographers is the seemingly random series of numbers that we have come to know as the f-stop scale or aperture scale. Things start out innocently enough f/1, f/1.4 (just add 0.4 every time, right?), but things get ugly quickly -- f/2, f/2.8, f/4. Why would anyone invent such an arbitrary scale?

Canon 18-55mm Kit Lens Aperture Blades in Slow Motion

Here's an interesting look at what the aperture blades on a Canon 18-55mm (the kit lens for many DSLRs) look like. The video above shows the blades moving into position at 120fps. This happens every time you shoot a photograph and in the blink of an eye.