What are fixed focal length lenses, and why are they used in photography?

A Fixed Focal Length lens or a constant-focal-length lens is widely used in photography. The focal length of fixed-focal-length lenses is constant, and they cannot zoom. Fixed focal length lenses are also known by other names, such as prime lenses or constant lenses, that help capture sharp, clear, and quality images. They have maximum apertures, which recommend them for photography in low light. They find application in macro photography, landscape photography, and portrait photography. Fixed-focal-length lenses have fewer moving parts and a simple design. They allow more light to pass through the lens to achieve high-quality images. Superior CCTV offers a wide range of fixed length lenses in China.