Nasco Middle School Standard Microscope, 0.65 NA Condenser 5-Hole Disc Diaphragm, 20-watt LED Illumination | Compound Microscopes | Microscopes & Magnification | Lab Equipment & Supplies | Science | Education Supplies | Nasco
![ZEISS Microscopy Online Campus | Interactive Tutorials | Condenser Light Cones and Numerical Aperture ZEISS Microscopy Online Campus | Interactive Tutorials | Condenser Light Cones and Numerical Aperture](https://zeiss-campus.magnet.fsu.edu/tutorials/basics/condenserlightcones/lightconesfigure1.jpg)
ZEISS Microscopy Online Campus | Interactive Tutorials | Condenser Light Cones and Numerical Aperture
![Amazon.com: AmScope - 40X-2000X Trinocular Compound Darkfield Microscope with Oil Condenser - T490B-DKO : Electronics Amazon.com: AmScope - 40X-2000X Trinocular Compound Darkfield Microscope with Oil Condenser - T490B-DKO : Electronics](https://m.media-amazon.com/images/I/71hlfk+d87L._AC_UF894,1000_QL80_.jpg)