When using a camera with a built-in zoom lens, it gets a little more complex. As you zoom toward the telephoto end of the camera’s range, it can’t let in as much light (because the aperture gets smaller). As a result, it needs to crank up the sensor’s light sensitivity, which increases digital noise. You might have to do a little experimenting to find the perfect balance of zoom and noise for your specific camera, especially if it’s something with a monstrous 50x zoom. Many cameras also offer “digital zoom,” which you should ignore because it’s just cropping in on the image, which you can do better in post.