Ross portrait attachment No. 3 C. de V. Petzval type lens
Ross portrait attachment No. 3 C. de V. lens. Portrait lens made by Ross. Petzval type, F:10", f4 with slot for waterhouse stops number 37611. Fitted to 1990-5036/8684.
Ross portrait attachment No. 3 C. de V. lens. Portrait lens made by Ross. Petzval type, F:10", f4 with slot for waterhouse stops number 37611, with case containing 6 waterhouse stops, numbers 0-6. Rack and pinion focusing. (M1792) Fitted to 1990-5036/8684.
Ross portrait attachment No. 3 C. de V. lens. Portrait lens made by Ross. Petzval type, F:10", f4 with slot for waterhouse stops number 37611. Fitted to 1990-5036/8684.
6 waterhouse stops, numbers 0-6.
Leatherette case for 6 waterhouse stops, Ross & Co Opticians, London.