What is the effect of zooming in on a camera's focal length?

Zooming in on a camera increases the focal length. This is because zoom lenses are designed to change the focal length, allowing photographers to either bring distant subjects closer or create a narrower field of view. When you zoom in, you are effectively lengthening the distance between the lens and the image sensor for a given subject, which results in a higher focal length. This leads to a more magnified image of the subject, enhancing the details and making it appear closer, while also reducing the depth of field, which can create a pleasing blur effect on the background. The concept of focal length is crucial in understanding how zoom lenses manipulate perspective and composition in photography and videography.