See also Lens city in Pas-de-Calais (France).
Lenses are objects that can refract the light, producing images according their format.
Convex Lens
Sammellinse
Positieve lens
Abbildung durch Sammellinse
Optical Collimating lens.
english
italian
Optical effects of a drop of oil
optical effects of a dew
A camera lens
Canon lens with and without lens hood
85mm f/1.8
135 mm Carl Zeiss Sonnar
Fisheye