What's the difference between the picture taken by the camera lens by changing the focal length and the picture taken by changing the position? Expect professionals to give a concise and detailed disc

What's the difference between the picture taken by the camera lens by changing the focal length and the picture taken by changing the position? Expect professionals to give a concise and detailed discussion. The so-called focal length change generally refers to wide angle and telephoto, which is easy to understand. The prominent feature of wide angle is that the perspective effect is obvious, that is, the near is big and the far is small. We can use this to highlight the subject, and at the same time use the long depth of field of wide angle to keep the exterior of the subject moderately clear, so it is more suitable for landscape figure photography.

In addition to the short depth of field, telephoto can also be compressed by equal distance in space, so that objects or people far away can get close together, such as athletes before departure. Using telephoto can make them stick together and make the picture compact. You can also use short depth of field to blur the background, clean up the picture and highlight the subject.

The most obvious change in position is the use of wide-angle terminals, and further step-back framing will have great changes.