When the SLR shoots student activities indoors, the aperture priority is always empty and the shutter priority is very dark. How should I set it? Ordinary fluorescent lamp in lobby?

Let me analyze the reasons for this. Aperture takes precedence because the shutter speed is still very low at the maximum aperture, such as110s, which is definitely virtual. This virtual point is not a virtual point, but a handshake paste. Shutter priority is dark, because the maximum aperture of the lens can't meet the incoming light, which leads to underexposure, so it is dark. Solution: Improve sensitivity. Depending on the specific situation, ISO800 1600 can generally meet the requirements. Setting: Aperture takes precedence, sensitive to 1600, and probably won't paste. It is recommended that the sensitivity should not exceed 800.