Why doesn't the camera make noise?

After watching many high-definition movies, the camera can take very clear and noise-free pictures in very dim light. What equipment do they use?

Large aperture lens, domestic camera for filming. Most of the cameras are ARRL (Alai) cameras, and the camera photography film is better than the digital image sensor. Moreover, the lens is the focal plane of Zeiss. Most of these lenses are fixed-focus, with a particularly large aperture, and some can reach F0.95. This kind of lens is also very expensive, generally 70,000 to100,000! Also, the relationship between filming is all played out. The price of a set of movie lighting equipment ranges from hundreds of thousands to millions. You can also take pictures when shooting, and measure light accurately in the exposure instrument!

The aperture is large enough. I don't know how you set the sensitivity iso. If set to automatic, the sensitivity will be automatically adjusted to a higher level in dim light, and of course there will be noise in the picture. There are two adjustment methods:

First, set the sensitivity iso to manual or fixed, which should be below 1000, but the result is that the picture is a little dark under dim conditions.

Second, if possible, brighten the surrounding light, and the sensitivity will naturally decrease.

If you take pictures, you can also slow down the shutter as much as possible, or use software to increase the brightness later.

I hope it helps, not playing with a knife in front of Guan Gong, hehe.

Film camera 5000ISO has no noise. What concept?

Since ISO800, the noise has gradually increased. When reaching ISO5000, the noise of the image will magically drop to the same level as ISO800 due to the use of another set of processing circuits. Thereby having high sensitivity and no noise at the same time. Such excellent photosensitive ability surprised the audience. Why surprise? This makes it possible to shoot in low light. Documentaries and night scenes are simpler and more convenient to shoot, and the effect is better.