Camera with lens and metal focussing cover, (deal wood), c. 1840. During 1838 and 1840 Talbot purchased a number of cameras to make photogenic drawings from the London instrument maker, Andrew Ross. This camera may derive from this source. Equipped with simple lens there is also an inspection hole in the lens panel above the lens that was use to check that the image was centrally located on the sensitive paper and correctly focused. Box Camera 1835-1845