How does a SLR camera shoot real colors?

1. White balance problem. Solution 1: Use a custom white balance and put a piece of pure white paper (white card is best) in the shooting environment for sampling and shooting. Option 2: put a gray card in the same shooting scene (you can replace it with a neutral gray object, that is, tell the camera that red = green = blue on this thing) and shoot it as a new file. Open this new file in PS, CTRL M, click the gray straw in the middle, and click the gray card to determine the new layer. Drag this layer to the picture of the same shooting scene and save it as it is. 2. Color space problem. Nikon has its own NikonsRGB color space, just set the camera to sRGB color space. If the camera is set to NikonsRGB, please use NX software to set it to sRGB output before printing. 3. Printer color cast problem. If there is no color calibrator, it is really difficult. It is best to use original ink.