A lens can be converging (convex) or diverging (concave). The centre of the lens is called the optical centre C. In a ray diagram, a converging lens is drawn as a vertical line with outward facing ...

Techniques / 3 Reasons Why Converging Verticals In Photos Can Be A Good Thing Converging lines and verticals don't always have to be avoided. In fact, they can be a clever tool for guiding the eye ...