United Scientific Supplies Neutralizing Glass Lens Set
Set of two lenses, one concave and one convex, 38mm in diameter. Both lenses have a focal length of 150mm.
Manufacturer: United Scientific Supplies NELS38
This set includes two 38mm dia. lenses that are the exact dual of one another - one has a focal length of +155mm (a converging lens) and the other has a focal length of -155mm (a diverging lens). When these two lenses are fitted together, the diverging lens exactly cancels the converging effects of the converging lens.
|2 Lenses, 1 concave and 1 convex, 3.8cm dia., 15cm focal length|
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