Camera resolution

The resolution of the camera is expressed by multiplying vertical and horizontal pixels. Generally speaking, the highest shooting resolution is similar to the total number of available pixels. For example, 6000×4000, which is the maximum resolution of a camera with about 24 million pixels. 8um/piexl This refers to the pixel size, which means that the minimum recording unit of this camera sensor is 8um.

These have nothing to do with the actual size of the subject, but only with the imaging size of the subject after conversion on the sensor.