Which shutter speed category produces motion blur, such as in water?

• A. Very fast
• B. Moderate
• C. Real-time
• D. Slow

Answer: (D)

Motion blur happens when the camera’s shutter stays open long enough for movement to be recorded. Water flowing or splashing is continuous motion, so using a slow shutter speed lets that movement smear across the frame, giving the smooth, silky look of the water. In contrast, a very fast shutter freezes motion, so the water would appear sharp and still; terms like moderate or real-time don’t produce the same pronounced blur. The slow shutter speed is the one that creates that characteristic motion blur in water. For best results, use a tripod and consider lowering ISO or using an ND filter to keep exposure under control during daylight.