The Raspberry Pi has provided experimenters with many channels of enquiry, and for me perhaps the furthest into uncharted waters it has led me has come through its camera interface. At a superficial ...

I've been looking at lenses and have noticed that they are denoted by the lens size in mm and by f-stop. How do I interpret these numbers? I've noticed that wide angle lenses usually have very small ...

The F-number of a photographic lens is a measure of its light-gathering ability, and is expressed as its aperture diameter divided by its focal length. Lenses with low F-numbers are prized by ...