What does wide-angle lens mean? Introduction to wide-angle lens

What does wide-angle lens mean? A wide-angle lens is a photographic wide-angle lens with a focal length shorter than a standard lens, a larger angle of view than a standard lens, a longer focal length than a fisheye lens, and a smaller angle of view than a fisheye lens.

Fisheye lens

Take the interchangeable lens suitable for 35mm single-lens reflex camera as an example. The fisheye lens is a short focal length with a focal length of about 6-16mm. Ultra-wide-angle photography lens, fisheye lens is its common name. In order to achieve the maximum photographic angle of the lens, the front lens of this photographic lens is diameter-shaped and protrudes parabolically toward the front of the lens, which is quite similar to the eye of a fish, hence the name fisheye lens. The biggest function of the fisheye lens is its wide viewing angle, which can generally reach 220 or 230°, which creates conditions for shooting large-scale scenes at close range; the fisheye lens can create a very strong perspective effect when shooting close to the subject, emphasizing the The contrast between the large and small objects near and far makes the pictures taken have a shocking appeal; the fisheye lens has a long depth of field, which is conducive to expressing the long depth of field effect of the photo. There are two types of images produced by fisheye lenses. One is like other lenses, the image fills the screen; the other is circular. No matter what kind of imaging, the image taken with the fisheye lens is quite deformed and has a strong sense of perspective convergence.

The fisheye lens is larger. Take the fisheye lens suitable for a 35mm single-lens reflex camera as an example. When this fisheye lens is installed on a smaller 35mm single-lens reflex camera body, there is a problem of a large head (lens) and a large body (body). ) feels small, and because the fisheye lens is not light (for example, the Nikkor 6mm/F2.8 manual focus fisheye lens weighs 5200 grams), after a single-lens reflex camera is equipped with a fisheye lens, the camera and lens The overall weight increases and the center of gravity moves forward. Photographers must pay attention to keeping the camera steady when holding the camera for shooting. As mentioned before, the front element of a fisheye lens is large in diameter and thrown toward the front of the lens, so this lens cannot be equipped with a filter like a normal lens. Fisheye lenses usually use built-in filters. According to the shooting needs, the photographer controls the filter conversion ring on the lens to convert the required filter into the photography light path of the lens. The front lens of the fisheye lens is a very important lens in the entire lens. Since it is thrown toward the front of the lens, photographers must pay special attention not to collide with the lens when shooting (especially when shooting close to the subject). In addition, when some old-fashioned fisheye lenses are connected to a 35mm single-lens reflex camera, the rear of the lens is inserted deeply into the camera body, and the camera's mirror must be flipped up and locked. The camera's pentaprism viewfinder will not be usable and must be installed on the camera. Photography can only be done by setting additional framing.

Standard lens

Take the interchangeable lens suitable for 35mm single-lens reflex camera as an example. A standard lens usually refers to a photographic lens with a focal length between 40 and 55mm. It is The most basic of all lenses for photography. The standard lens gives people a documentary visual effect, so in actual shooting, its frequency of use is relatively high. However, on the other hand, since the picture effect of a standard lens is very similar to the visual effect of the human eye, the picture effect shot with a standard lens is very ordinary, even very dull. It is difficult to obtain a wide-angle lens or The dramatic effect of a telephoto lens. Therefore, it is quite difficult to take vivid pictures with standard lenses. Even experienced photographers think that it is not easy to use standard lenses well. However, the visual effects expressed by standard lenses have a natural sense of closeness. When shooting with standard lenses, the distance to the subject is also relatively moderate. Therefore, they are often used in photography situations such as ordinary landscapes, ordinary portraits, and snapshots. The most common Commemorative photos are mostly taken with standard lenses. In addition, what photographers often overlook is that the standard lens is also a lens with excellent imaging quality, which is very effective in expressing the details of the subject.