Optically Worked Double Concave Glass Lens, 75mm Diameter, 500mm Focal Length Subcategory_Weights and Masses Built around a monochromatic yellow

Built around a monochromatic yellow LED light source and simplified optics

supplying the standard short-reach patch wire for student-built 4mm-socket circuits at the bench

ásold separately

a less-common metal reference for density-investigation comparisons alongside the standard brass

V-location formed by two hexagonal bars and a hexagonal carriage prevents sag along this 1

Optically Worked Double Concave Glass Lens, 75mm Diameter, 500mm Focal Length Subcategory_Weights and Masses Built around a monochromatic yellowVery long focal 75mm double concave glass lens at 500mm focal length, the gentle diverging curvature yielding subtler virtual image reduction for nuanced refraction work.