Demainbray's convex lens
1750
Achromatic doublet lens with a focal length of 52 inches
1780
Pair of safety goggle lenses, with case
Two green lenses set in a wooden holder
Two biconvex lenses
Four lenses
1880-1950
Lens, finger tip shape incomplete
1880-1950
Lens, glass, finger tip shaped
1880-1950
Lens, glass, thumb tip shaped
1880-1950
Pair of lenses
1880-1950
Lens, glass, roughly oval
1880-1950
Lens, roughly circular
1880-1950
Eight clear glass lenses
1880-1950
Pair of glass lenses
1910-1950
Schneider 150mm Symmer -S lens
Horn framed reading lens with trefoiled handle
1680-1700
Optician's trial set of lenses
Reading lens in wooden frame and handle
1650
Reading lens in leather mount, 1701-1730
1701-1720
Stanhope lens
1829-1845
Stanhope lens of greenish glass
Set of opticians trial lenses in wooden box
Two "Franklin Split Bifocal" lenses: (1) Oval
Photo lens Ross patent airo
Photo lens
Photo lens
Photo lens
Photo lens
Photo lens
Photo lens
Selenium glass signal lens
2a. Patent portrait lens front crown
Cylindrical concave lens, focal length about 75mm
1900-1980
Cylindrical bi-concave lens
1900-1983
Cylindrical plano-convex lens
1900-1983
Lenses illustrating manufacture of Dallmeyer Stigmatic F/6 lens
Lenses illustrating manufacture of Dallmeyer Stigmatic F/6 lens
Watson close-up lens
Thallium bromo-iodide lens, one of ten, c. 1960
1955-1965
Thallium bromo-iodide lens, one of ten, c. 1960
1955-1965
Thallium bromo-iodide lens, one of ten, c. 1960
1955-1965
Super Takumar F3.5 135mm Lens
Early Single Lens by Ross
Takumar F3.5 135mm Lens
Pentax FA F4 28-70mm Lens
Cooke Wide-Angle Lens
Pentax 110 Zoom F2 20-40mm Lens
Takumar Zoom F4 45-125mm Lens
Cooke Lens 20mm. f3.5
