The three lenses of the Loft microscope.

A: Eyelens dia=18mm, f=37mm
B: Field lens dia=36mm, f=70mm
C: Objectives

Three brass pillars support the brass sample stage and cardboard drawtube.
Cardboard drawtube is covered with dyed ray skin.
The marks, 0-4, correspond to the initial focus positions of the five included objectives.