What s the difference between optical zoom and digital zoom, which is better

Optical zoom. For digital cameras, "optical zoom" does not change the size or resolution of **, and the number of pixels used to describe ** also remains the same, which is the fundamental difference between "optical zoom" and "digital zoom", which is reflected in the image, that is, the image quality will be different. As shown in Figure 3, setting the focal length at 115mm and keeping the camera in the same position, the result is that the size of the subject (cabin) in ** is significantly larger, and you can see more detail in the cabin, but ** has the same resolution as in the left image, which is 1600 1200 pixels.

Digital zoom. Digital cameras equipped with fixed focal length lenses can often simulate optical zoom to form a zoom**, a type of zoom known as "digital zoom". It works in a similar way to how we enlarge a part of an image on a computer, except that "digital zoom" is done directly on the CCD during the shooting process.

To be precise, Digital Zoom is simply a cropping tool that cuts out a portion of an image that is out of view when using a long focal length lens, and stores only a selected area. Any camera has to look at optical zoom, digital zoom will seriously lose image quality, and the resulting ** frame will also become smaller, so it is basically of no practical significance.

Optical zoom is good. Optical zoom.

Zoom is achieved by relying on an optical lens structure, which is similar to a traditional camera design, depending on the focal length of the lens, and is used to zoom in and out of the scene to be captured by moving the lens of the camera. The greater the optical zoom factor, the farther away the object can be captured. Optical zoom can support the image subject after imaging, the resolution and image quality will not change, and it is relatively clear.

Digital zoom. In fact, it is an electronic enlargement of the image, and a part of the pixels on the original CCD image sensor is enlarged using an "interpolation" algorithm. Through digital zoom, the captured scene is enlarged, but its clarity will be reduced to a certain extent, similar to the Zoom function in VCD or ***, which can only reduce the original image size, so that the image becomes larger on the LCD screen, but it will not make the details clearer.

To put it simply: optical zoom is to zoom in and out of the scene by changing the relative position of the lens in the lens, and optical zoom will basically not cause the image quality to be reduced; Digital zoom is used to change the pixel size through the processor in the digital camera, so that the visual perception of the scene is enlarged or reduced, and digital zoom will reduce the image quality, so optical zoom is better than digital zoom.

1. The difference between digital zoom and optical zoom is that optical zoom achieves 10 times closer to the shooting target through the movement of the focal length of the lens, which can clearly magnify the image without any loss of image quality. The digital zoom function magnifies the image by 120x. But the picture quality has an impact.

2. When the digital camera with optical zoom zooms at a distance, the sense of space and hierarchy of people or things is better than that of digital zoom, but the use of digital zoom products is more convenient.

The difference between digital zoom and optical zoom is the difference in image quality. Digital zoom is to increase the area of each pixel in the digital camera through the processor in the digital camera, so as to achieve the purpose of magnification. The optical zoom is a stuffy makeup that relies on the optical lens structure to achieve zoom, that is, the camera lens movement to enlarge and shrink the scene to be photographed, the larger the optical zoom multiple, the farther the scene can be photographed.

Digital zoom is a change in the vertical direction of the sensor to give people a zoom effect. The smaller the area on the sensor, the more visually the user can see only the part of the scene. However, since the focal length does not change, the image quality is relatively poor compared to normal.

Through digital zoom, the captured scene is magnified, but its clarity will be reduced to a certain extent, so digital zoom and can't make much practical sense.

Optical zoom is created by a change in the position of the lens, object, and focal point. When the imaging surface moves in the horizontal direction, the angle of view and focal length of the slag judgment will change, and the farther scenery will become clearer, making people feel like an object is progressing. Another important point of learning zoom lenses is the zoom ability, which includes both optical zoom and digital zoom.

Although both can help magnify distant objects during telephoto shooting, only optical zoom can support the addition of more pixels after the image of the subject, so that the subject is not only larger, but also relatively clearer. In general, the higher the zoom factor, the more suitable it is for telephoto shooting. Optical zoom, like conventional camera design, depends on the focal length of the lens, so the resolution and image quality do not change.

The differences between digital zoom, optical zoom, and digital zoom are as follows:

1. The use of the above zoom methods is used to shorten the distance and magnify the image.

2. Digital zoom is the effect of enlarging the pixels through the built-in software function of the camera, so the larger the size, the more blurry the photo will be, affecting the sharpness. Digital zoom costs little because it is a software feature, and the overall gagging of the camera is now negligible.

3. Optical zoom is realized through the hardware function of the camera lens, which is equivalent to placing a high-power telescope before the photo, because the clarity of the photo is very high, the finer the lens, the clearer the magnified photo, and the sharper the photo imaging. Therefore, the better the imaging of the optical zoom camera lens, the more expensive it is.

4. Digital zoom and digital zoom are different names for the same function.

Optical zoom uses lens movement to zoom in and out of the scene to be photographed. The greater the optical zoom factor, the farther away the object can be captured.

Digital zoom is actually an electronic enlargement of the image, in which the pixels on the CCD image sensor are enlarged to the entire screen using an interpolation algorithm. With digital zoom, the captured scene is magnified, but its clarity will be reduced to a certain extent, so digital zoom does not have much practical significance.

To put it simply, optical zoom is a real sense of zoom, ** when it comes out, it is a real zoom effect, and digital zoom is not able to change the pixels of the photo, but only visually zoom in and out.

To put it simply, optical zoom is to change the distance of the photographed object, and digital zoom is to enlarge the photographed object!