What do you mean by 2K camera and 4K?

Mbth 2K resolution is a general term for display devices or contents with a horizontal resolution of about 2000 pixels. 4K resolution belongs to ultra-high definition resolution, and the pixel value of each row in the horizontal direction reaches or approaches 4096, regardless of the frame ratio.

For example, 4096×3 1 12 with a full aperture of 4K, 3656×2664 of 4K Institute and 3840×2 160 of UHDTV standard all belong to the category of 4K resolution.

Extended data

2K=2=2048，4K=2=4096。

In most cases, 4K ultra-high definition digital movies are digital movies with a resolution of 4096×2 160, that is, there are 4000 pixels horizontally. At present, most digital movies in China are 2K, with a resolution of 2048× 1080. Some digital movies are1.3k (1280×1024), while the so-called rural movie projection is 0.8k (1024×).

A real 4K movie is shot by a 4K camera and projected by a 4K projector. Other 4K movies were shot on 35mm film and then converted into 4K digital format. Because the resolution of film film is roughly equal to or slightly better than 4K, the clarity of the film after transcription can be guaranteed.

Baidu Encyclopedia -2K

Baidu Encyclopedia -4K Resolution