If you decrease the shutter angle, how much more light would you need for key exposure?

If you decrease the shutter angle, how much more light would you need for key exposure?

• A. More light
• B. Less light
• C. No change
• D. Twice as much light

Answer: (A)

Lowering the shutter angle reduces the time the shutter is open each frame, so less light reaches the film or sensor during exposure. To keep the same key exposure after shortening the angle, you need to compensate with more illumination (or adjust another setting). The exact amount of extra light depends on how much you reduce the angle, but the general rule is you need more light, not less or the same. Doubling the light would only apply in a specific, particular angle change, not as a universal rule.

Lowering the shutter angle reduces the time the shutter is open each frame, so less light reaches the film or sensor during exposure. To keep the same key exposure after shortening the angle, you need to compensate with more illumination (or adjust another setting). The exact amount of extra light depends on how much you reduce the angle, but the general rule is you need more light, not less or the same. Doubling the light would only apply in a specific, particular angle change, not as a universal rule.