What is scaling? What is an airplane seat? What are there?

Another focus of the lens is zoom capability, including optical zoom and digital zoom. Although both of them are helpful to enlarge distant objects in telephoto shooting, only optical zoom can support adding more pixels after the main body of the image is imaged, making the main body not only larger but also relatively clearer. Usually, the larger the zoom factor, the more suitable for telephoto shooting. Optical zoom, like traditional camera design, depends on the focal length of the lens, so the resolution and image quality will not change. Digital zoom can only reduce the size of the original image and make the image larger on the LCD screen, but it does not help to clarify the details. So when buying a digital camera, we often suggest that you pay attention to the multiple of optical zoom. At present, mid-range cameras generally have about 3 times optical zoom, but there are also products with long zoom function, such as 10 times optical zoom models.

The airplane seat is where the machine is.

Look down, look up or look horizontally?