Campbell Harper Studios was the photography business of John Campbell Harper. Initially based in Leith Walk, Campbell Harper first advertised himself as a 'learner, just left school' in October 1907 and the shop is described as 'formerly Harper & Smellie.' Campbell Harper later moved his business to 13 South David Street, near Edinburgh's Princes Street, where he sold cameras and related accessories as well as running a photo studio. By 1970 the managing director of the company was George Robb, formerly head of Ferranti's Film Unit, and services offered included aerial photography. The business is known to have been operational until at least 1972.