Can SLR digital cameras zoom optically?

SLR has no digital zoom parameters, and digital zoom is meaningless. In fact, it just enlarged the picture, and the picture quality did not improve.

Optical zoom depends on the lens. Generally, the nose is a zoom lens, and the focal length range of zoom is different. There is also a special fixed-focus lens, and the focal length cannot be changed. Generally, fixed-focus lens is better than zoom imaging.