How much can a simple microscope magnify an object?

A simple microscope, which consists of a single lens or a set of lenses functioning as a single unit, typically provides low magnification in the range of 2–10× for standard applications. However, historical designs were capable of significantly higher power; for instance, the simple microscopes crafted by Antonie van Leeuwenhoek in the 17th century could achieve magnification up to 300×.12

The magnifying power of such an instrument is determined by the ratio of the least distance of distinct vision (typically about 25 cm) to the focal length of the lens. While simple microscopes are effective for observing small organisms and details, they are subject to optical aberrations that can limit image clarity. For higher magnification requirements, compound microscopes are generally preferred, as they utilize multiple lens arrays to overcome the resolution constraints inherent in single-lens systems.3425