Objective No. 4 showing the lens element and small aperture to reduce spherical aberration.
The length of each lens is 1.8cm.
The aperture for each lens is 4mm.
|
Objective
|
Dia
|
f
|
Aperture
|
|
2
|
7mm
|
6mm
|
3mm
|
|
3
|
8
|
8
|
3
|
|
4
|
9
|
13
|
3
|
|
5
|
9
|
16
|
3
|
Microscope No. 53 has four remaining objectives. No. 2-4 are biconvex lenses. Objective 5 is a plano-convex lens.