What does the abbreviation "AF" stand for in photography?

The abbreviation "AF" stands for "Auto Focus" in photography. Auto Focus refers to the camera's ability to automatically adjust the lens to achieve a sharp focus on the subject without requiring manual adjustments from the photographer. This feature is essential for capturing clear and well-defined images, especially in dynamic situations where the subject is moving or in low-light conditions. Proper use of Auto Focus can significantly enhance the photographer's efficiency and ability to capture decisive moments with precision, freeing them to concentrate on composition and other creative aspects of photography.

The other options do not accurately represent the commonly used terminology in photography; hence, they do not fulfill the definition required by the question. Auto Focus is a widely recognized term, making it the correct choice in this context.