70D set 18-200, what mode should I choose for the concert? Or how to debug iso, exposure, shutter and so on? Ask a professional photographer for help?

The people who are in file A and file M first are very different. There is no difference between A-file exposure and M-file exposure. More often, it depends on whether the exposure is more accurate and how fast the pace is. For example, file M can have a larger exposure compensation range than file A, and file A is more convenient than file M..

The most important thing in concert shooting is "shooting", and the lighting is dim (if it is far away). It is recommended to bring a monopod (tripod is not easy to put) for easy movement. If you want to take panoramic pictures, you will need the support of a small aperture (otherwise the ISO image quality will be very rough).

A zoom lens with a medium telephoto lens usually takes close-ups of some stars. The focal length is too short to shoot close-ups or busts.

Monopod ensures image quality and flexibility of movement.

Multi-purpose aperture priority mode A file

Use continuous shooting mode to capture stage movements. Sometimes you don't have time to shoot an action. It is best to set the continuous shooting number in advance and press the shutter at the beginning of the action.

Using different seats, running more, shooting from behind can show the momentum and presence of the stars, shooting the stage from a height can show a lively atmosphere, and so on.