Should the photos taken with SLR be revised later?

Need, especially professional cameras. The tolerance of professional cameras is far less than that of human eyes. What the human eye sees is a spectacular scene, and the effect of the camera may be very general. For example, if you stand outside the window and look at the blue sky and white clouds, you can see the texture details of the window frame inside the room and the clouds, people, cars and blue sky outside the window at the same time with the naked eye. When you shoot a normally exposed original film from the same angle, you will find that the details of the window frame in the photo are very dark, almost invisible, and nothing can be seen outside the window, with very high contrast and gray color. At this time, the dark part can only be brightened by post-adjustment, and both parts can be dimmed to restore the most authentic visual experience. However, the mobile phone is more tolerant than the professional camera through its own algorithm, and will automatically process the photos taken, so it will be more convenient for the mobile phone to take such scenes, but the image quality is far less than that of the camera. (Off-topic: picture quality ≠ pixels, mobile phone manufacturers have always used high pixels as a synonym for high picture quality to mislead consumers. The biggest difference between using a SLR and using a mobile phone is that the space in the later stage of SLR is much larger than that in the mobile phone. It is meaningless if the SLR does not retouch the picture (except news photography, because it needs timeliness). No one wants to see bad originality with distorted pictures.