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LENSES SPHERICAL, UNMOUNTED, BI-CONVEX
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Made of polished glass with ground edges.
Bi-convex lens: Magnifying or condensing lenses, with two outward curving symmetrical faces.
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Diameter |
Focal Length(+) |
Cat. No. |
38mm | 50mm | 3305-01 |
| 100mm | 3305-02 |
| 150mm | 3305-04 |
| 200mm | 3305-05 |
| 300mm | 3305-07 |
| 500mm | 3305-08 |
| 1000mm | 3305-09 |
50mm | 50mm | 3305-21 |
| 100mm | 3305-22 |
| 150mm | 3305-24 |
| 200mm | 3305-25 |
| 300mm | 3305-27 |
| 500mm | 3305-28 |
| 1000mm | 3305-29 |
75mm | 150mm | 3305-41 |
| 200mm | 3305-45 |
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LENSES SPHERICAL, UNMOUNTED, BI-CONCAVE
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Made of polished glass with ground edges.
Bi-concave lens: Used for reducing the size or spreading out light, with two inward curving symmetrical faces.
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Diameter |
Focal Length(+) |
Cat. No. |
38mm | 50mm | 3309-01 |
| 100mm | 3309-02 |
| 150mm | 3309-04 |
| 200mm | 3309-05 |
| 300mm | 3309-07 |
| 500mm | 3309-08 |
| 1000mm | 3309-09 |
50mm | 50mm | 3309-21 |
| 100mm | 3309-22 |
| 150mm | 3309-24 |
| 200mm | 3309-25 |
| 300mm | 3309-27 |
| 500mm | 3309-28 |
| 1000mm | 3309-29 |
75mm | 2000mm | 3309-45 |
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LENS, DEMONSTRATION SET, GLASS
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For showing the most important types of lenses.
Optically true with ground glass edges. Includes one each of double convex, plano-convex, double concave, plano-concave, concavo-convex and convexo-concave lens arranged in a velvet lined case.
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Diameter |
Cat. No. |
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38mm |
3313-01 |
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50mm |
3313-02 |
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NEUTRALISING LENS SET, GLASS
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Comprised of one each of biconcave and biconvex lens, 38mm in dia. and 15.5cm focal length, which when used together neutralise each other, the resulting effect being that of a plane glass.
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