Mode of Operation
•  Manual zoom: The photographer needs to manually adjust the zoom ring or related devices on the lens to change the focal length, so as to close or push the subject. The photographer needs to rely on his own experience and judgment of the image to complete the zoom operation.
•  Autozoom: Usually controlled by the camera's software system, without the photographer to manually operate the zoom device. The phase opportunity automatically adjusts the focal length according to the preset conditions or the detection of the shooting object.

Principle
•  Manual zoom: relying on the photographer to turn the zoom ring of the lens, changing the relative position of the lens inside the lens through the mechanical structure, thus changing the focal length of the lens.
•  Autozoom: The software detects the sharpness of the photographed object, and then automatically adjusts the focal length parameters. For example, when targeting a person or an object, the phase opportunity is analyzed to determine the appropriate focal length.

Characteristic
Manual zoom
• High flexibility: the photographer can accurately and freely control the zoom process and amplitude according to their own creativity and actual needs, to achieve a unique shooting effect.
• Complex operation: the photographer needs to have certain photography knowledge and skills, be familiar with the zoom operation of the lens, and need to spend time and energy to adjust the focal length during the shooting process.
The response speed depends on the photographer: if the photographer is skilled, he can complete the zoom quickly; but if not, the timing may be missed.

Automatic zoom
• Easy to operate: Convenient for users who are not familiar with photography or need to snap quickly, the camera can automatically zoom process without manually adjusting the focal length.
• Adaptability: The camera can quickly and automatically adjust to the right focal length according to the characteristics of the scene and object, with an advantage in some emergency or quick response situations.
• May not be accurate: Autozoom is based on the preset algorithm and detection mechanism of the camera, which may not be able to fully meet the personalized needs of the photographer, and may not achieve the desired zoom effect in some complex scenes.

Applicable scene
Manual zoom
• Photography creation: in the need to accurately control the picture composition, to show specific creative effects, such as shooting close-up, creating special visual effects, manual zoom can make the photographer better realize their own ideas.
• Static scene shooting: For relatively static scenes such as scenery and static life, the photographer has enough time to manually adjust the focal length to obtain the ideal picture effect.
Automatic zoom
•Capthe moment: in the shooting of sports scenes, animals, emergencies and other need to quickly capture the moment, autozoom can adjust the focus length in time, not miss the wonderful moment.
•Daily records: For ordinary users' daily photo records, the convenience of autozoom can allow users to shoot the pictures they want.