Anatomy of a Microscope - Substage Condensers | Olympus LS
2PCS 23mm Optical Glass Focal Length 18mm Height 8.2mm LED Optics Plano convex condenser Lens for COB LED - - Amazon.com
Condenser properties condensed — San Francisco Microscopical Society
100mm Dia x 200mm Focal Length, PCX Condenser Lens | Edmund Optics
Optical imaging featuring both long working distance and high spatial resolution by correcting the aberration of a large aperture lens | Scientific Reports
Illuminating spot size & intensity changed by condenser lens