What does "focal length" indicate in cinematography?

What does "focal length" indicate in cinematography?

• A. The length of time a scene is filmed
• B. The distance between the lens and the image sensor
• C. The height of the camera tripod
• D. The width of the film screen

Answer: (B)

Focal length in cinematography refers to the distance between the lens and the image sensor when the subject is in focus. This measurement, typically expressed in millimeters, is crucial because it determines the field of view, the perspective, and the depth of field in an image. A shorter focal length (wide-angle lens) captures a wider scene, making it ideal for landscapes or tight spaces, while a longer focal length (telephoto lens) offers a narrower view, allowing for a closer appearance of distant subjects. Understanding focal length helps cinematographers select the appropriate lens for achieving the desired visual effect and composition in their shots.

Focal length in cinematography refers to the distance between the lens and the image sensor when the subject is in focus. This measurement, typically expressed in millimeters, is crucial because it determines the field of view, the perspective, and the depth of field in an image. A shorter focal length (wide-angle lens) captures a wider scene, making it ideal for landscapes or tight spaces, while a longer focal length (telephoto lens) offers a narrower view, allowing for a closer appearance of distant subjects. Understanding focal length helps cinematographers select the appropriate lens for achieving the desired visual effect and composition in their shots.