There are clear image zoom and digital zoom. What's the difference between them?

Zoom: change the focal length of the lens to change the perspective of the photo.

Focus: usually adjust the distance between the lens and the negative to make the image of the negative clear. The general shooting procedure is to enlarge the shooting range first, and then focus to make the subject clear.

2. Different ways to adjust the shooting distance.

The zoom lens can expand the picture range (wide-angle state) or narrow the picture range (medium and long focal length, telescope) by rotating the zoom ring (mechanical and manual) of the zoom lens relative to the fixed focal length, that is, at the same position. Fixed focal length lens can't change the picture range;

Focusing refers to adjusting the distance ring so that the distance between the photographer and the subject is consistent with the camera's instructions to ensure the clarity of the subject. Auto focus refers to the distance captured by the camera through infrared automatic measurement. Simply put, zooming is to pull the object into or out of the image, while focusing is to make the image of the lens coincide with the sensor, so as to get a clear image.

3. Different emphases

Manual and automatic focusing refer to whether the image is clearly focused after the light is refracted to the photosensitive chip. If the camera has autofocus, the lens will automatically detect how to adjust the lens in the lens (the same focal length) to achieve full focus on an object. Manual focusing is your own manual lens, which is generally used for macro. Therefore, the common blurred state in photos is caused by incorrect "focusing".

4. Different classifications

There are two main types of digital camera zoom, one is physical zoom and the other is electronic zoom. Physical zoom, also known as optical zoom, uses the distance between lenses to reflect and refract the light of an object, making it closer or farther. Because it is the actual movement of the lens, it belongs to physical zoom and will not distort the imaging effect. Therefore, the higher the optical zoom factor, the better the effect.

Electronic zoom, also known as digital zoom, can zoom or zoom an object through electronic means and software operation, so that the greater the distortion, the greater the multiple distortion.