These superior quality unmounted Double Convex Lenses with ground edges are useful for teaching a variety of optical principles.
| Order# | Description |
| 7-909-35 | 50mm d. x 25cm. F.L. |
Double convex lenses have two outwardly curved surfaces and a positive focal length.
There are several other sizes of double convex lense available below.
| Order# | Description |
| 7-909-1 | 38mm d. x 5cm. F.L. |
| 7-909-2 | 38mm d. x 10cm. F.L. |
| 7-909-3 | 38mm d. x 15cm. F.L. |
| 7-909-4 | 38mm d. x 20cm. F.L. |
| 7-909-5 | 38mm d. x 30cm. F.L. |
| 7-909-23 | 50mm d. x 5cm. F.L. |
| 7-909-24 | 50mm d. x 10cm. F.L. |
| 7-909-25 | 50mm d. x 15cm. F.L. |
| 7-909-26 | 50mm d. x 20cm. F.L. |
| 7-909-35 | 50mm d. x 25cm. F.L. |
| 7-909-6 | 75mm d. x 17.5cm. F.L. |
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