Ask about the shooting range of the camera. (at 20 o'clock)

You asked about the shooting angle of the lens? Because there seems to be no camera in the world. Based on 135 film, the horizontal angle of 13mm lens is 1 18 degrees. Because 13mm is fisheye glasses, the photos taken will have a black box around the circular photos. The horizontal angle of 16mm lens is 180 degrees. Because 16mm is fisheye glasses, and the lens only takes the central part of fisheye, the angle coverage range is 180 degrees. If the effect of shooting with 13mm lens (that is, all ranges are required), the horizontal angle is only 1 10 degrees. The horizontal angle of the 28mm lens is 75.4 degrees. The horizontal angle of the 35mm lens is 63.4 degrees. The horizontal angle of the 50 mm lens is 46.8 degrees. The horizontal angle of the 70mm lens is 34.3 degrees. The horizontal angle of the 90 mm lens is 27.4 degrees. The horizontal angle of 135mm lens is 18.2 degrees. The horizontal angle of the 420mm lens is 5.9 degrees. The horizontal angle of 500mm lens is 5 degrees. If it is medium film, large film, APS or digital camera, the angle calculation will be different. If you calculate the diagonal, you need to use the image circle to calculate, and its angle will be greater than the above value.

Reference: websites of major camera and lens manufacturers.

The focal length of a wide-angle fisheye lens is extremely short, generally 6mm- 16mm. The lens in front of the lens is large and protruding, like a fisheye, so it is called a fisheye lens. Its viewing angle is very large, from 140 to above 180, and from 140. Wide-angle lens means that the focal length is shorter than the diagonal of the shot picture. Generally, it is 35mm and 28mm, and the shortest is 15mm or 13mm. Its structure is symmetrical. Because of the large viewing angle, it is called wide angle. The biggest advantage of wide angle is its large viewing angle, that is to say, the shot picture is wide, which can shoot a wider range than the standard lens. 1.Vtrawide angle: focal length 17mm-2 1mm, viewing angle110-90 2. Morerate wide angle: focal length 24mm-35mm, viewing angle 90-60.