Optical Zoom
The closer we focus on a subject (at a longer focal length), the more it reduces the aperture. Unlike digital zoom, optical zoom does not suffer a loss of image quality, although camera shake can be a problem without a tripod.
The closer we focus on a subject (at a longer focal length), the more it reduces the aperture. Unlike digital zoom, optical zoom does not suffer a loss of image quality, although camera shake can be a problem without a tripod.