Certified Professional Photographer (CPP) Practice Exam

What type of increase is required when using a filter due to light intensity reduction?

1. Exposure

2. Brightness

3. Shutter speed

4. Aperture size

The correct answer is: Exposure

When using a filter that reduces light intensity, an increase in exposure is necessary to compensate for the decrease in light reaching the camera's sensor. This reduction can occur due to various types of filters, such as neutral density filters, which are designed to lessen the amount of light entering the lens without affecting color. To achieve the correct exposure, you might need to adjust the camera settings to allow more light to hit the sensor over a given time. This could involve lengthening the exposure time, which refers to the duration the sensor is exposed to light. It also might entail widening the aperture to let in more light or increasing the camera's ISO setting, but in essence, the key factor here is adjusting exposure to maintain the desired brightness of the photograph despite the light reduction caused by the filter. Selecting adjustments to brightness or shutter speed, while related, does not directly address the basic requirement to modify exposure itself to achieve appropriate image results, making the focus on exposure the most fitting choice in this context.