The Richter Optica S2-EYE stereo microscope eyepieces (paired) have a 30mm diameter and are made for use with the S2 dual power stereo microscopes. Three magnifications are available:

S2EYE-10x: Widefield 10x eyepieces / 20mm field of view. Accepts 24mm diameter reticle.

S2EYE-15x: Widefield 15x eyepieces / 15mm field of view. Accepts 24mm diameter reticle.

S2EYE-20x: Widefield 20x eyepieces / 10mm field of view.