Fonk first completed his advanced studies in textile technology and then embarked on his career in photography, as a fashion photographer. In San Francisco he began photographing interiors, architecture, art and design. At the end of 1991 he launched his own publication, OBJEKT, which has meanwhile achieved world wide circulation in its English-language edition, OBJEKT International. Over the years, OBJEKT International has produced some stunning features on prominent interior and textile designers, antique dealers, artists and architects throughout the world. For OBJEKT International, he is also responsible for most of the photography, as well as the design, layout and editorial production.