See also Lens city in Pas-de-Calais (France).
Lenses are objects that can refract the light, producing images according their format.
Converging lens [edit]
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Abbildung durch Sammellinse
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Optical Collimating lens.
Diverging lens [edit]
Types of lens [edit]
Natural lenses [edit]
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Optical effects of a drop of oil
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Camera lens [edit]
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Schneider Keruznach Symmar S 210mm
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Schneider Symmar S 210mm large format lens