Traditional Culture Encyclopedia - Photography major - Excuse me, how to adjust the focal length of SLR Canon 700dM file?

Excuse me, how to adjust the focal length of SLR Canon 700dM file?

Manual exposure of 700D M gear, the adjustment method of autofocus point is the same as other gears: press the button, and use the up, down, left and right keys or dial to select autofocus point.

When taking a view with an LCD screen, the box is the focus, and when it turns green, it is in the correct focus. When using manual focusing, you can press the zoom button to zoom in, which is more accurate. The subject and background are clear at the same time: the distance between the subject and the background is close, and the aperture used is small (press the preview key of depth of field to check the depth of field before shooting); Blurred at the same time: no focus.