Justin lectures at Falmouth University and is considered a world expert in pinhole photography and camera obscura, having taught around the world for more than 28 years. His work includes Mouthpiece, images from inside his mouth, Slow Light, six-month exposures, and Awfullogrammes. Justin was the pinhole photography consultant for the film The Brothers Bloom by Rian Johnson, starring Rachel Weisz and Mark Ruffalo. He has published three books, the most recent being Discovering Light, and is founding director of the Real Photography Company, which runs a community darkroom in his home city of Bristol.