Several models of microscopes are available to use. All of them are standard optical microscopes but some can accommodate some modules such as screens.
Two of our microscopes are Olympus models and one of them is able to accommodate the screen. We also have Zeiss model where the optics seem to be more powerful. Our last microscope with reverse optics lacks a bulb and still needs to be fixed.
Olympus 2 + Usb MicroCam
They are fragile objects and are obviously sensitive to dust.
It is important that they remain protected by the bags or cardboard placed on top of them.
Please be careful to turn them down when your experiment is over in order for the light-bulbs to last.