In short, the smaller the focal length, the wider the angle of view and the more 'wide-angle' the lens. The larger the focal length, the narrower the field of view and the more 'telephoto' the lens.

Additionally, with a 4X lens on a 35 mm sensor, the field of view is about 9 mm so you have to have a steady hand just to keep everything in frame. [Micael] also bracketed the focus to get several ...