# Lesson Eight: Filter Factors

Welcome to your Lesson Eight: Filter Factors

1. Which line has the “full” f-stops in the correct order?

2. Which line has the “full” shutter speeds in the correct order?

3. If you move the f-stop from F11 to F8, what happens to the amount of light that reaches the sensor?

4. If you move the shutter speed from 1/125 to 1/250, what happens to the amount of light that reaches the sensor?

5. How much more or less light reaches the sensor if you move the shutter speed from 1/60 to 1/30?

6. How much more or less light reaches the sensor if you move the shutter speed from 1/500 to 1/125?

7. How much more or less light reaches the sensor if you move the shutter speed from F4 to F16?

8. A filter factor of 4X represents a required increase of how many stops?

9. A filter factor of 8X represents a required increase of how many stops?

10. A filter factor of 16X represents a required increase of how many stops?

11. Given an exposure of F8 @ 125 at 100 ISO, what would be the new exposure if using a filter with a 4X Filter Factor?

12. Given an exposure of F5.6 @ 500 at 100 ISO, what would be the new exposure if using a filter with a 4X Filter Factor?

13. Given an exposure of F16 @ 15 at 100 ISO, what would be the new exposure if using a filter with an 8X Filter Factor?

14. Given an exposure of F11 @ 60 at 400 ISO, what would be the new exposure if using a filter with an 16X Filter Factor?