What is the main difference between a prime lens and a zoom lens?

The main difference between a prime lens and a zoom lens lies in their focal length capabilities. A prime lens has a fixed focal length, meaning it does not have the ability to zoom in or out. Instead, it is designed to capture images at a specific distance, which can often result in superior image quality, faster maximum apertures, and generally lighter weight compared to zoom lenses. This fixed focal length allows photographers to develop a specific style or perspective, as they must move physically closer or farther away from their subjects to frame a shot.

Zoom lenses, on the other hand, have a variable focal length, allowing for greater versatility in composition without the need to move. While this versatility is beneficial in many shooting situations, it can sometimes sacrifice image quality and speed due to the complexity of the lens construction.

Thus, the correct choice highlights the defining characteristic of a prime lens, distinguishing it clearly from a zoom lens in terms of focal length capabilities.