The SLR lens is shot at sunset. Will it be okay to delay shooting?

You're talking about time-lapse shooting. If you use M or B, I suggest you don't do it. If the exposure time is too long and the energy is too high, it should not be a problem to increase the exposure according to machine metering. The lens is simply a magnifying glass, focusing on cmos, and the sun is long. I think there is still a problem.