Excuse me, heroes, what are the short, medium and telephoto lenses suitable for shooting? Is there a strict definition of focal length? thank you ...

Short focal length, that is, wide angle, is suitable for shooting scenery, because the shorter the focal length, the wider the picture.

Medium focus is generally used to take portraits.

Telephoto, depending on its length, is suitable for shooting birds, taking close-ups of people's faces, or taking candid photos. (Because the photo is far away, the person being photographed is not easy to find)

There is no strict definition of focal length in use, mainly focusing on viewing angle and experience.

Macro lens mainly has a relatively large magnification, which allows the subject to occupy a relatively large proportion in the picture. The focal length is relatively large recently. For example, an ordinary lens 30 cm away from the subject will be too close to focus, while a macro lens can.