Certified Professional Photographer (CPP) Practice Exam

Which aspect of a camera directly relates to its ability to capture fast motion without blur?

1. Shutter speed

2. Aperture size

3. ISO sensitivity

4. White balance

The correct answer is: Shutter speed

Shutter speed is the aspect of a camera that directly impacts its ability to freeze fast motion and capture action without blur. When the shutter speed is set to a fast duration, it allows the camera to expose the sensor for a very short period of time. This minimizes the likelihood of motion blur caused by moving subjects during the exposure process. Fast shutter speeds can effectively capture quick movements, such as a sprinter on the track or a bird in flight, by freezing the action in a clear image. Other factors like aperture size, ISO sensitivity, and white balance do play roles in photography but do not directly influence motion capture to the same extent. Aperture size affects depth of field and light exposure but does not inherently control how motion is captured. ISO sensitivity impacts the camera's ability to perform in low light but, again, does not address motion clarity directly. White balance is concerned with color temperature and ensuring accurate color reproduction, which does not relate to the capture of motion in a photograph.