19.7k views
5 votes
A camera gives a proper exposure when set to a shutter speed of 1/250 s at f-number F8.0. The photographer wants to change the shutter speed to 1/1000 s to prevent motion blur. To maintain proper exposure, she should also change the f-number to...? The answer is F4.0.

User Felix Cen
by
7.3k points

1 Answer

4 votes

Answer:

F4.0

Step-by-step explanation:

To obtain a shutter speed of 1/1000 s to avoid any blur motion the f-number should be changed to F4.0 because the light intensity goes up by a factor of 2 when the f-number is decreased by the square root of 2.

User Tddmonkey
by
8.5k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.