Thomas Rodger was an early Scottish photographer. He studied at the University of St Andrews and was a protégé of Dr. John Adamson who also persuaded him to become a photographer. At age 14, he was apprenticed to Dr. James, a local chemist and druggist, whilst studying at Madras College. Adamson later taught him the calotype process which he had earlier taught his famous brother, Robert Adamson. Adamson persuaded him to assist Lord Kinnaird in his calotype studio at Rossie Priory. Rodger enrolled at the Andersonian College of Glasgow to study medicine, but Adamson persuaded him to set up a professional business in calotyping in St Andrews.

John Adamson was a Scottish physician, pioneer photographer, physicist, lecturer and museum curator. He was a highly respected figure in St Andrews, and was responsible for producing the first calotype portrait in Scotland in 1841. He taught the process to his brother, the famous pioneering photographer Robert Adamson. He was curator of the Literary and Philosophical Society Museum at St Andrews from 1838 until his death.