Spectrometer

The unit has an attached collimator, rotating telescope platform, 26-mm achromatic optical system with 10× Ramsden eyepiece and crosshair, a 16-cm-diameter enclosed graduated circle (in 1/2° increments) with a double-ended external 0–30 × 1' Vernier with 2 built-in scale magnifiers, 8-cm-diameter stage with engraved ring pattern, and a 6-mm-tall adjustable width slit (0–2 mm). Includes equilateral prism (25 × 25 mm), 600 lines/mm diffraction grating, instructions, and storage box.