Benjamin Martin had a large workshop which produced instruments under his name; made improvements to the microscope and wrote extensively in the field of natural philosophy.

Traded at South St., Chichester, Sussex (1736-40), Hadley Quadrant & Visual Glasses, nr Crane Court, Fleet St., London (1756-62), Two doors from Crane Court, Fleet St. (1756-9), resident in Fleet St. (1756-82), Four doors East of Crane Court (1760), The New Invented Visual Glasses, Fleet St. (1761) & 171 Fleet St. (1767-77), London.