Eyepiece optics. Top lens (R) dia=18mm, f=28mm; Bottom lens (L) dia=18mm, f=34mm.
Eyepiece partially assembled.
Microscope body and focus knobs. A: Fine focus, B: coarse focus, C: jam-screw for microscope rotation.
All objectives are single, bi-convex lenses, with an aperture much smaller than the diameter of the lens.
Objective
Diameter (mm)
f
1
(no glass)
NA
2
2
<2
3
3
<2
4
4
2
5
5
3
6
7
5
7
7
10
8
8
8
9
(no glass)
NA
10
(no glass)
NA
A: Ramsden eyepiece
B: Field lens, dia=24mm
C: Objective