The new waterproof camera that the insurance company provided when the old waterproof camera proved not to be waterproof has a feature where it has a couple of LEDs round the lens, configured as a ring light. They come on when you shoot macros.

I thought I would try it today, and snapped a pic of the first thing that came to hand – my calculator. It worked pretty well!

There was a time when I understood the use of every function on my scientific calculator – even the hyperbolic trigonometric functions. Alas, those days are gone…