Oak tree, c 1841.
© National Media Museum / Science & Society Picture Library
An oak tree in Carclew Park the home of Sir Charles Lemon. Calotype by William Henry Fox Talbot (1800- 1877). Fox Talbot invented the negative/positive proces for making photographs between 1835-39. Any number of prints could be made from the same shot by transferring the negative image on to special paper; these prints were called calotypes.