The drawtube consists of a distal field lens and front eyelens. The lens mounts and eyecup are constructed of turned Lignum vitae. Field lens dia=18mm, f=45mm. Eyelens dia=18mm, f=15mm.
Assembled drawtube is 60mm.
The microscope comes with these six objectives. None are marked.
Each objective has a single biconvex lens sitting in a cup-shaped brass mount and maintained in place with a brass cap.
Low magnification objective.
High magnification objective
|
|
Diameter
|
f
|
Aperture
|
|
1
|
13mm
|
10
|
3.5
|
|
2
|
11
|
6
|
2.0
|
|
3
|
11
|
3
|
1.5
|
|
4
|
5
|
2
|
1
|
|
5
|
3
|
~1
|
1
|
|
6
|
1.2
|
<1
|
1
|