Fiberite sheet with aperture 4.5 x 6cm. Stamped 1,2,3,4,5,6. Attached cord with 9 knots.Used to estimate field of view given with various lenses. Arthur Kingston. Viewmeter
Accessory folding frame viewfinder; lazy tong construction; settings; accessory shoe fitting; in box. Sinclair Viewmeter
Sinclair viewmeter. James A. Sinclair, London. Collapsible frame finder and viewmeter in brass; lazy-tong construction. With camera fixing plates (3) and screws. Sinclair viewmeter. James A. Sinclair
