IAI Photography Practice Test 2026 – Comprehensive Exam Prep Resource

To "freeze" the movement of a slow-moving vehicle traveling at 30 mph, a shutter speed that is fast enough to capture the moment without blur is essential. Typically, a shutter speed of 1/500 of a second is considered adequate for freezing moderate motion, such as that of a vehicle moving at 30 mph.

At this speed, using 1/500 allows the camera to efficiently capture the vehicle's position at an exact moment, significantly reducing the effect of motion blur that could occur if a slower shutter speed were used. The higher the shutter speed, the more effective it becomes at freezing motion. While faster options exist, such as 1/1000 or 1/2000, they may be more suited for capturing fast-moving subjects, such as sports or faster vehicles, providing more headroom for quick movements. However, for the given scenario, 1/500 strikes a balance between effectively freezing motion and not requiring excessive light conditions that faster shutter speeds would necessitate.