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
B: Field lens, dia=24mm
C: Objective