Obj
dia
f
1 1 3
2 1 6
3 1.5 5
Optics of the Dollond microscope: A: Threaded arm for using the instrument as a single magnifier; B: Objectives "1" through "3"; C: Lieberkuhn (missing the lens).
Microscope stand used to support the screwbarrel attachment.
Instrument stand used as a single magnifier.