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Fixed Focal Length Lenses

The focal length of a lens is the distance between the lens's optical center (or principal point) and the image sensor or film when the lens is focused at infinity. In simple terms, it is the distance from the lens to the point where parallel rays of light converge or appear to diverge after passing through the lens.

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Shanghai Optics Inc. - Metuchen, NJ

Manufacturer of advanced optical components and optical assemblies. Offers custom optics manufacturing and custom optical design and engineering services. A top lens manufacturer specializing in coated optics, thin-film coatings, custom lens assembly and delivering cost-effective custom optical solutions.

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Glossary

focal length The focal length of a lens is the distance between the lens's optical center (or principal point) and the image sensor or film when the lens is focused at infinity. In simple terms, it is the distance from the lens to the point where parallel rays...

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