Optics: A: Objective; B: Field lens; C: two-lens eyepiece.
The microscope comes with two sets of objectives. A high-magnification set numbered 1–9, and a low magnification set labeled 1–6 (upper row).
Low magnification objectives have a longer snout and are threaded on the outside as well as inside.
Obj
Dia
f
2
7mm
12
3
7
8
4
7
7
5
5
4
6
4
2
1
3
15
2
2
13
3
2
11
4
1.5
9
5
missing
6
1
7
7
1
8
8
<1
6
9
<1
5