In photography, infinity refers to a focusing point at a very large distance, effectively representing objects so far away that their light rays are considered parallel when entering the lens. Setting a lens to infinity ensures that distant subjects, such as landscapes, cityscapes, or night skies, appear sharp in the image.
Understanding infinity focus is essential for landscape, astrophotography, and architectural photography. By correctly using the infinity setting, photographers can maximise depth of field and ensure distant elements remain in clear focus, producing sharp and well-defined images throughout the scene.