The zoom function of the lens is very useful during the process of taking pictures. The zoom can be divided into digital zoom and optical zoom. What is the difference between digital zoom and optical zoom? Which is better for digital zoom and optical zoom? Let's answer for everyone.
The difference between digital zoom and optical zoom
(1) Optical zoom
Optical zoom is achieved by moving the optical lens to achieve the focal length, which gives the most beautiful picture quality, but the average model is between 10 and 18 times. A camera or camera with an optical 10x zoom is about the same as a 400 camera telescope.
Optical zoom is produced by changes in the position of the lens, object, and focus. When the image plane moves in the horizontal direction, the vision and focus will change, and the farther scene becomes clearer, making people feel like the object is moving forward.
(2) Digital zoom
Unlike optical zoom, digital zoom is a vertical change in the vertical direction of the sensor, giving it a zoom effect. The smaller the area on the photosensitive device, the visually let the user see only the part of the scene. However, since the focal length does not change, the image quality is poor relative to the normal case.
Digital zoom is actually a kind of picture enlargement, which is the result of partially magnifying the picture taken. Imagine if you zoom in on a 3x5 photo 50 times, the picture quality will definitely become rough. And the bigger and the rougher the release. However, when shooting a distant view, you can select the distance and the clear best point according to the actual situation.
Digital zoom and optical zoom which is better
Although both of them have the advantage of magnifying distant objects during telephoto shooting, only optical zoom can support the image main body to image, and then add more pixels, so that the main body not only becomes larger, but also relatively clearer. Generally, the larger the zoom factor, the more suitable for telephoto shooting. Optical zoom is the same as traditional camera design, depending on the focal length of the lens, so the resolution and quality will not change. Digital zoom can only make the original image size smaller, making the image larger on the lcd screen, but it does not help to make the details clearer.
The above introduces the difference between digital zoom and optical zoom. Which ones are better, or should be determined according to the user's specific conditions.
Recommended reading: What does optical zoom mean? What is the meaning of digital zoom? The bigger the optical zoom, the better?
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