OMAX Darkfield Condenser for Stereo Microscopes

there are several YouTube videos showing how to make a duck fill condenser for a compound microscope in this video I focus on making a dark fill condenser for a stereo microscope but first a few words about a compound microscope making a dark filled pap stock for a compound microscope is normally straightforward especially if there's a filter holder on the condenser so all you need is to make a small patch from some black electrical tape and transparent food container just draw a circle about 32 millimeters diameter to make the transparent patch and then add a center circle made out of a black electrical tape that you can cut from something like a dime to get a 17 millimeter circle just pop that into the filter holder and make sure the condenser iris is fully open and then put your sample on the stage and wrap the condenser up so you get the dark field effect making their dark fill cond