Catalogue Page from Exhibition Catalogue: 1897 Forty-second Annual Exhibition of the Royal Photographic Society

showing (E97A037) Exhibit no. 458: Frame of three 12 x 10 negatives, showing the performance of a half-plate (7.6 inches focus) stigmatic (f/6) lens upon 12 x 10 plates by J. H. Dallmeyer Ltd. ()