125. Dallmeyer Rapid Rectilinear, c. 1870
Signed: 'J. H. Dallmeyer. N1 39976 10 x 8. LONDON. Rapid Rectilinear. PATENT'.
One of the first and the most famous of the symmetrical doublets working at about f8 with a focal length of 300 mm. There is a between-lens slit for Waterhouse stops.
Length 88 mm, diameter 64 mm.
Inventory no. 57,654.