BRESSER 20x Plan Microscope Eyepiece (30mm Diameter)

Designed to fit their Analyth ICD and Science ETD-101 microscopes, the BRESSER 20x Plan Microscope Eyepiece has a 30mm barrel diameter with a planar lens that presents a flat field of view across almost the entire field of view, so the only noticeable curvature (spherical aberration) will be around the extreme edges of the view.