The main job of a lens is to concentrate (focus) light rays so the film or digital sensor can record the scene. Put simply, the distance it needs to make the light rays converge completely is called ...

Replay: Do we really need to keep using 35mm as our baseline for focal lengths, or is there a much better way? Why do we keep reading descriptions like ‘3.7 mm to 92.5 mm (equivalent to 28.8 mm to 720 ...

When light moves from air into glass or plastic it is refracted close refractionProcess by which a wave changes speed and sometimes direction upon entering a denser or less dense medium, eg a light ...

If you’re new to the world of photography, the idea of a lens that doesn’t zoom might seem a bit odd. Even our phones have zoom lenses on them now, or a least a version of zoom thanks to multiple ...

If you recently acquired your first interchangeable lens camera, you’re probably already thinking about what lenses to add to your bag. As cool as your new DSLR or mirrorless camera is now, it won’t ...