No prizes for guessing the first thing you'll need: a microscope ... To see an object, the eye piece lens and the objective lens magnification are multiplied together to give the total magnification.

as it couldn’t be used with the 40X objective lens, but because the microscope came with two eyepiece lenses, magnification could be increased to 250X, which was plenty for all the specimens we ...

The BX61WI is the motorized version of the BX51WI fixed-stage microscope ... objective (XLUMPLFLN20xW) makes high-resolution observation possible with a wide range of intermediate magnification ...