Optical system of the Nuremberg microscope. The eyepiece (A, dia=17mm) and field lenses (B; dia=25mm) are mounted to the top tube. The objective (C; dia=9mm, f=12mm) is mounted to the bottom tube.
The eyepiece (A) and field (B) lenses are spaced 8.5cm apart.
The objective lens is held in place in the turned base of the bottom tube with this brass ring.
The field lens is mounted at one end of the top body tube.
The eyepiece lens is mounted at the opposite end of the top body tube.