Lenses of the Oppelt microscope: A: Objective; B: Intermediate tube; C: Eyepiece consisting of two lenses: 2.5cm diameter, f=2.5cm
The objective has a detachable Lieberkuhn. This particular reflector is unusual in that it is not silvered, but rather appears painted gold.
Objective components: A: Lens (bi-convex, 1.2cm dia, f=1.2cm); B: Objective body; C: Lieberkuhn;
D: Objective top cover with 5mm aperture.