Study · Focus

Focus

Interactive study · code written with AI assistance · not camera work

A night exterior seen through a real lens. Choose a format, a prime and a stop, then pull focus across five planes: a slate at 1.2 m, an actor at 3 m, a practical lamp at 7 m, festoon lights at 18 m and the city at 60 m. Every blur is the thin-lens equation, and every disc of light takes the shape of the iris.