What focal length is typically associated with a standard lens?

A standard lens is commonly defined by its focal length, which allows for a natural perspective that closely resembles human vision. The 50 mm focal length is particularly noted for its versatility and is often referred to as the "nifty fifty" due to its ability to perform well in various shooting conditions. It captures images with a field of view that closely approximates what the human eye sees, making it ideal for a wide range of photography, from portraits to street photography.

While other focal lengths may produce different effects—such as a wider angle with 35 mm or increased magnification with 70 mm and 100 mm—the 50 mm remains the benchmark for standard photography. It strikes a balance between being narrow enough for moderate close-ups and wide enough for general scenes, making it the most commonly recommended lens for beginners and professionals alike.