Which of the following can be used to magnify small objects to fill the frame?

A macro lens is specifically designed for capturing small subjects at very close distances while maintaining a high level of detail and clarity. The functionality of a macro lens allows it to provide life-size or greater magnification (1:1 or greater) of the subject. This is essential for photographing intricate details of small objects, such as insects or flowers, making it the ideal choice for filling the frame with a small subject.

While other lens types, like wide-angle and telephoto lenses, can capture small objects, they are not optimized for such close-up photography. Wide-angle lenses tend to have a broader field of view, which is great for landscapes but can make small objects appear distant. Telephoto lenses, on the other hand, excel in capturing distant subjects but lack the ability to focus closely enough to maximize small objects in the frame.

Thus, the macro lens stands out as the tool specifically utilized for magnification in photography, allowing photographers to create visually striking images that highlight the details of small objects.