Questions about stage photography. Please answer the master's question.

First, the quality of photos is related to the sensitivity, but it is more related to the quality of photoreceptors, especially the quality of light information collected by pixels. The pixel of the old digital camera is not necessarily very high, but the pixel quality and the quality of the photoreceptor are in a comprehensive and balanced relationship. This will be more obvious in high-light and low-light lighting conditions. The contrast of the stage lights is relatively large, and the lighting of the stage lights is relatively strong. Therefore, it is not necessary to have high sensitivity, but high quality.

Secondly, D90 is an APS-C size photoreceptor. If the sensitivity, white balance, photometry, aperture and focal length are all manual, you can only shoot with 1600 degrees or 85 mm/f1.8,800 degrees, and the photos taken should be overexposed. If that's the case, why not lower exposure value by one or two levels?

Third, the reason why the color temperature fluctuates should be caused by the change of stage lighting, which is cold and warm for a while. If so, why not take a middle value? For example: 5600 degrees, try to make the stage warmer, or determine a general tone according to the overall content of the stage.