What is a fisheye lens?

We know that a wide-angle lens, which is shorter than a wide-angle lens, is a super wide-angle lens, but what is shorter than a super wide-angle lens? It is the fisheye lens that we introduced today. Fisheye lens, also known as panoramic lens, is also a kind of ultra-wide-angle lens with short focal length, which has a shorter focal length and a larger field of view than ordinary ultra-wide-angle lens. It is called panoramic lens because its focal length can be as short as shooting 180 or even wider field of view. So how can we call it a fisheye lens?

Generally, the focal length of fisheye lens is between 6mm and 16mm (about 50 mm for standard lens). Generally, we think that a fisheye lens with a focal length of 6mm to 16mm forms a deformed scene. In addition, the fisheye lens is similar in shape and function, so it is named fisheye lens. Second, what are the characteristics of fisheye lens?

The angle of view of the fisheye lens is equal to or greater than 180, and some even reach 230, that is, the field of view is particularly wide. The fisheye lens retains the barrel distortion of the image to exaggerate its deformation effect. Except for the central part of the picture, all other straight lines will become curved arcs. The depth of field of the picture shot by the fisheye lens is particularly large, and a clear object image can be formed from the front of the lens 1 meter to infinity.

There are two basic types of fisheye lenses: one is a round fisheye lens, which is used to shoot a circular image with the frame width of the negative as the diameter. The other is a diagonal fisheye lens, which produces a rectangular distorted image with negative Quan Huafu.

3. What scene is the fisheye lens suitable for shooting?

According to the picture characteristics of fisheye lens, fisheye lens is most suitable for shooting circular scenes, such as amphitheater, square panorama, sky and so on. The shooting range of fisheye lens is extremely large, which can greatly exaggerate the perspective effect of the scene. The picture shot with fisheye lens appears tall, wide and vast. Fisheye lens was originally designed for the needs of celestial photography, but now it is also used to take large-scale panoramic photos or obtain imaginative special effects. The fisheye lens has serious barrel distortion, which sometimes makes the picture look interesting.