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The definition and principle of fisheye lens,fisheye lens is a wide-angle lens,which is characterized by a very wide viewing angle,can shoot curved images,and make the picture have a unique visual effect.China ShengQiang Optoelectronics will introduce the definition and principle of fisheye lens to help readers better understand the working principle and usage of fisheye lens.Definition of fisheye lens:fisheye lens is a kind of wide-angle lens,its viewing angle usually exceeds 100 degrees,and it can shoot curved images,making the picture have a unique visual effect.Fisheye lenses are usually used to capture wide scenes such as buildings,cityscapes,interior spaces,etc.
The principle of the fisheye lens:The principle of the fisheye lens is to use a spherical lens to focus the light on the image sensor,so as to achieve wide-angle shooting.The spherical lens of a fisheye lens is usually composed of multiple lenses to reduce distortion and chromatic aberration.The angle of view of the fisheye lens is usually more than 100 degrees,and it can shoot a curved image,so that the picture has a unique visual effect.
How to use a fisheye lens:The way to use a fisheye lens is similar to that of a normal lens,but you need to pay attention to the following points:
1.The angle of view of the fisheye lens is extremely wide.It is necessary to pay attention to whether the elements in the picture are too dense or too sparse.
2.The distortion of the fisheye lens is large,and it is necessary to pay attention to whether the straight lines in the picture are bent or distorted.
3.The depth of field of the fisheye lens is relatively shallow,so you need to pay attention to the selection of the focus and the adjustment of the aperture.
In a word,the fisheye lens is a unique wide-angle lens that can shoot curved images with unique visual effects.When using a fisheye lens,you need to pay attention to the density of elements in the picture,straight line distortion and depth of field to obtain the best shooting effect.
