The main types of the largest image

The uniqueness of image maximum lies in the use of 70mm wide film or multiple 35mm films and a large screen, so the image is large and clear, accompanied by stereo sound, and the audience has an immersive feeling. Image maximum is in the process of development, with many kinds and great changes. The following are relatively stable and widely used:

IMAX image maximum

In order to greatly increase the resolution of the image, IMAX uses a special 70 mm negative. The image size of traditional 65mm film is 48.5mm× 22. 1mm (Todd-AO), and the image size of IMAX film is 69.6 mm× 48.5 mm. In order to expose at the speed of 24 frames per second of standard film, the speed of IMAX film is three times that of ordinary film. In addition, there is the JAPAX system, whose frame area is more than five times that of the 35mm standard frame, and it can be projected on a screen with a width of 23m and a height of 17m. In addition, SHOWSCAN system can increase the frequency of shooting and projection to 60 frames per second to eliminate flicker and make the dynamic scene clearer.

Cherkarama

Ring screen movies are also called loop movies. 1955, the United States used a116 mm camera to shoot movies. The camera was installed on the frustum of a cone and took 1 1 film. They are shown simultaneously on 1 1 projectors respectively. The cinema is circular, with 1 1 screen on the wall, 2.4m high and 38m long, forming a 360-degree circle. Since then, screen movies have developed to 6 screens and 9 screens. China trial-produced 9 screens.

Dome film

Dome membrane is also called dome membrane. The representative is OMNIMAX, which, like Emmax, is also shot on 65mm negative and shown in 70mm copy. The frame area of the film is 10 times larger than the standard 35mm. Because both photography and projection use fisheye lenses, the projected image is hemispherical, just like the sky; A cinema is similar to a planetarium. The hemispherical screen extends from the front to the back of the audience, which is accompanied by three-dimensional effects. Especially in Omni Max's three-dimensional movies, the audience seems to be there, not only the objects in front of them seem to be within reach, but also some objects move behind them.

In addition to the above-mentioned maximum images, CINERAMA panoramic movies appeared in the 1950s. Three 35mm cameras are used for synchronous shooting and six projectors are used for rotary projection. When the three projectors show synchronously, the pictures are connected with each other to form a panoramic film with a curtain. Because of the huge equipment, especially when the three projectors show images, it is difficult to eliminate the seams. This kind of film was gradually eliminated after the 1960s.

The viewing effect of Image maximum is mainly determined by brightness, clarity, screen size and projection equipment.

How to choose a seat when maximizing the image?

On the issue of seat selection, when watching Image Maximization, the upward angle of the audience should not be greater than 12 degrees. If the seat is too far ahead, it will not only hurt your neck, but also make people dizzy. The position in the middle and front is the best, such as the cinema in row 30, and rows 10 to 15 are all good choices. However, if the seat is too far back, the "maximum image" screen may not completely fill the field of vision, which will also affect the viewing effect.