| Exposure Difference Given by Shutter Opening Relative to Maximum Shutter Opening | |||||||
| Exposure | Shutter Opening | ||||||
| Maximum | 200° | 180° | 175° | 170° | 165° | 120° | |
| Less 1/3 Stop | 159° | 142° | 139° | 135° | 131° | 95° | |
| Less 2/3 Stop | 126° | 113° | 110° | 107° | 104° | 76° | |
| Less 1 Stop | 100° | 90° | 87° | 85° | 82° | 60° | |
| Less 1 1/3 Stop | 79° | 71° | 69° | 67° | 65° | 48° | |
| Less 1 2/3 Stop | 63° | 57° | 55° | 54° | 52° | 38° | |
| Less 2 Stops | 250° | 45° | 44° | 43° | 41° | 30° | |
| Less 2 1 /3 Stops | 40° | 36° | 35° | 34° | 33° | 24° | |
| Less 2 2/3 Stops | 31° | 28° | 28° | 27° | 26° | 19° | |
| Less 3 Stops | 25° | 22° | 22° | 21° | 21° | 15° | |
| NOTE: Film Tests Should be Used to Verify Results | |||||||