Can the SLR lens zoom automatically?

2. The reasons are:

3. First, the zoom process is a photographic composition process, which also needs more accurate adjustment. Automatic zoom often can't control the range and angle at will.

4. Second, automatic zoom consumes a lot of power. Compared with non-SLR long zoom lenses, SLR lenses have larger aperture and higher optical zoom ratio. Therefore, from the perspective of power saving, automatic zoom is not easy.

5. Third, the SLR lens is a convertible lens. In order to achieve autofocus, it is necessary to add a corresponding driving motor to the lens, which not only increases the cost of the lens, but also takes a lot of energy to transmit data with the camera, which is of little significance. For photographers, the quality of photos will not be improved by automatic zooming, and shooting will be more convenient and the cost will be lower.

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