It was more than 300 years ago that Antoni van Leeuwenhoek gasped at the sight of what he called "little animalcules" skittering through pond water, their motion "so swift, and so various, upwards ...

Having 2 pairs of eyepiece lenses and 4 objective lenses, this microscope allows magnifications of between 40X and 2500X. This large range allows for a huge variety of specimens from organisms to ...

When an optical microscope with transmitted light is used at very high magnifications, the image of point objects may be distorted. They may be seen as fuzzy discs that are surrounded by ...