What are the specifications of Canon SLR camera lens?

EF-S refers to the special lens for APS frame machine, 55-250mm means that the focal length of the lens can be changed from 55mm to 250mm, and the maximum aperture of the lens (wide-angle f4, telephoto 5.6) is in f/4-5.6, which means that this lens supports anti-shake function, and II refers to the second generation product of this model.

From the point of view of imaging quality, the smaller the zoom factor, the better. From the point of view of convenience, it is hoped that the zoom factor will be larger.

The larger the aperture, the better (the smaller the value). If the entire focal length can achieve the same maximum aperture, it is basically a high-end lens.

Of course someone will make good use of it.

As for generations, whether the new is always better than the old is not easy to generalize.

For general household use, 18- 135 sets of Canon 600D or 650D are recommended.