How to set camera parameters when shooting panorama with SLR and fisheye lens?

The fisheye lens is a lens with a very short focal length and a viewing angle close to or equal to180. /kloc-a lens with a focal length of 0/6mm or less. It is an extreme wide-angle lens, and "fisheye lens" is its common name. In order to make the lens reach the maximum photographic angle, the front lens of this kind of photographic lens protrudes to the front of the lens in a parabolic shape, which is quite similar to the fish's eyes, hence the name "fisheye lens".

As we all know, the shorter the focal length, the greater the viewing angle, and the greater the viewing angle, and the stronger the deformation caused by the optical principle. In this way, except for the scene in the center of the picture, other scenes that should be horizontal or vertical have changed accordingly.

Pay attention to the level when shooting scenery, because distorted images will challenge your judgment with the naked eye. The closer you shoot, the more obvious the effect will be. If you only shoot at a normal distance, you won't get an exaggerated variant effect. Because of the variation, the images on both sides will be distorted when shooting. If you take a portrait, don't put the protagonist beside you, or it won't look like a human figure. When shooting, you should consider whether there will be too many things on the lens, which will make the photos dazzling and may make the theme unclear. Try to highlight the main body when composing a composition to avoid multiple main bodies appearing at the same time.

The closest focusing distance of the fisheye lens is about 0.2 m to 0.3 m, which can capture a clear small depth-of-field picture from front to far. However, this kind of close-up shooting is rarely used. When the photographer closes the aperture to F 1 1, under the effect of depth of field, the distance that can clearly image will be closer. In the case of uncertain whether the focal length is 0.7 m or 1 m, the photographer can set the focal length to 0.7 m, and the picture effect will not be wrong.