What is the primary function of a camera lens?

The primary function of a camera lens is to focus light onto the sensor. This process involves bending light rays using various glass elements designed within the lens to ensure that the image captured is sharp and properly exposed. When light passes through the lens, it is directed to converge at a focal point, which should ideally align with the camera's sensor. This focusing mechanism is crucial because without accurate focus, images can become blurry and lack detail.

While enhancing color saturation, increasing image resolution, and stabilizing video footage can be important aspects of photography and videography, they are not the primary purpose of the lens itself. Color saturation can be adjusted in post-production or by using filters, image resolution is typically determined by the sensor's capabilities, and stabilization is usually achieved through additional hardware or software. Therefore, focusing light onto the sensor remains the fundamental role of a camera lens, forming the basis for capturing quality photographic or video content.