Is SLR a telephoto lens or a wide-angle lens to shoot scenery?

This is a very interesting question, but the answer is uncertain.

That's why professional photographers take a whole set of lenses when they collect landscapes.

Zoom lens is actually born to reduce the bearing capacity of the lens.

Let's look at the relationship between lens focal length and viewing angle.

The longer the focal length, the smaller the viewing angle. This is actually the difference between wide angle (small focal length and large viewing angle) and telephoto (large focal length and small viewing angle).

Photographers standing in the same position must use a wide-angle lens or even a fisheye (180 perspective) in order to gain a wider field of vision.

If you take a long shot, you can only use telephoto to narrow the distance (just because of the angle of view, the subject accounts for a large proportion in the phase, which seems to narrow the distance). Shooting with telephoto is generally called "bird shooting".

Therefore, there is no standard answer to this question. It is only right to say that it is suitable.

Look at these two photos. Because there is a lake between them, we can't get near them. If the focal length of the first one is 70mm, the second one needs a lens with a longer focal length.

Of course, the photos are cropped here just to illustrate the problem.