What Is The Difference Between Optical and Digital Zoom?

The key difference between optical and digital zoom is how they magnify an image. Amcrest optical zoom cameras use the camera's physical lens to get a closer view, maintaining image quality, while digital zoom simply enlarges a portion of the image, which can degrade quality.

With optical zoom the camera's lens physically moves, changing its focal length to magnify the scene before it's captured by the image sensor. Because the magnification happens before the image is recorded, you don't lose any detail. The resolution remains the same, providing a clear and sharp image even when you are zoomed in. 

For Amcrest cameras, a high-quality optical zoom is ideal for applications where you need to see distant objects clearly, such as monitoring a large parking lot or a long driveway. The number before the "x" (such as 4x optical zoom) shows the ratio of the longest to the shortest focal length. For example, a 4x optical zoom can make a subject appear four times closer without any loss in clarity.