Why are there only four imax cameras?

Because it is a patent of MSM company in Canada, and the film IMAX photography is large in size and high in technology, it is difficult for other companies to guarantee stability and reliability.

In addition, the output of IMAX movies is also very small, so the camera cost is high and the output is low. At present, we only rent it, not sell it. Film IMAX camera uses 65 mm film to shoot horizontally, and then develops it into 70 mm reverse film for film IMAX projector. Its extreme clarity and authenticity are unparalleled.

Extended data:

Before an IMAX movie is released, the picture and audio track of the movie will be re-recorded, thus providing unparalleled picture quality and sound effects and maximizing the viewing experience of IMAX theaters.

IMAX will directly cooperate with the director to sharpen the picture, remove particles and defects and improve the resolution through the unique digital original reproduction technology (DMR), so as to improve the picture quality, create the best picture quality as much as possible, and play it in the best projection system in the world.

These technologies are only part of the reason why IMAX achieves higher brightness, color saturation and contrast. In addition, in the process of digital original sound reproduction technology of IMAX, we make full use of the expansibility of the dynamic range of the sound system to mix the sound channels.

Baidu encyclopedia -IMAX