As a boy, he attended a school with the intention of training to become a priest. However, when he moved on from this school he attended art college where his love of art widened to embrace photography. Landscape photography was originally a hobby to him while he worked as a printer for an advertising photographer after college. Having moved to America in the 1970s, Kenna began to think seriously about making a living in art and so his photography career began in earnest. Kenna is known for black and white landscape photography, which immediately adds an element of mystery to the image. His images are often uncluttered but evocative, showing a serenity within the scene which is tempered by the contrast of black and white. His images of urban areas are also uncluttered, hinting at civilization without displaying it overtly.