Depth of field in art and photography refers to which range?

• A. The color range from warm to cool
• B. The range from nearest to farthest that remains in focus
• C. The distance from camera to subject
• D. The rate of exposure

Answer: (B)

Depth of field is the range of distance in a photo that stays in acceptable sharp focus. It runs from the nearest point that is sharp to the farthest point that remains sharp within the frame. You control it mainly with the aperture, distance to the subject, and the focal length of the lens. A wide aperture (low f-number) gives a shallow depth of field, so only a small part of the scene is sharp while the rest blurs. A small aperture (high f-number) increases depth of field, bringing more of the scene into focus from near to far. Longer focal lengths tend to compress and blur more, while shorter focal lengths can keep more of the scene sharp. Getting closer to the subject typically reduces depth of field, whereas stepping back broadens it. For example, portraits often use a shallow depth of field to isolate the subject, while landscapes aim for deep depth of field to keep features from foreground to background sharp.

Color range from warm to cool relates to color temperature, not sharpness. Distance from the camera to the subject affects composition and perspective rather than the range of sharpness itself. Rate of exposure concerns how much light hits the sensor (shutter speed), not which distances stay in focus.