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 LENSES SPHERICAL, UNMOUNTED, BI-CONVEX

 

Made of polished glass with ground edges.
Bi-convex lens: Magnifying or condensing lenses, with two outward curving symmetrical faces.

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


 LENSES SPHERICAL, UNMOUNTED, BI-CONCAVE

 

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.

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


 LENS, DEMONSTRATION SET, GLASS

 

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.

Diameter

Cat. No.

38mm

3313-01

50mm

3313-02


 NEUTRALISING LENS SET, GLASS

 

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.

Cat. No.

3315-00


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