Extension bellows are a photographic accessory used to increase the distance between a camera lens and the film or sensor, allowing for closer focusing and greater magnification in close-up or macro photography. By physically extending the lens away from the camera body, bellows provide flexibility in controlling focus and achieving precise composition when photographing small subjects. The amount of extension determines the degree of magnification, making it possible to capture detailed images of insects, flowers, or intricate objects that would be difficult with a standard lens alone.
Extension bellows are particularly valuable in studio and product photography, where sharpness, perspective, and fine detail are critical. They give photographers creative control over depth of field and composition while maintaining image quality, making them an essential tool for anyone working in close-up, macro, or scientific photography.