Consult an online photographer.

1, the exposure should be accurate, so as to best reflect the color and level of the scene. Overexposure and underexposure will lose details;

2, the focus should be accurate, no matter how good the theme is, if the focus is not accurate, the image will become a waste film, which is difficult to remedy later;

3, stable shooting to prevent jitter, if the shutter speed is below 1/250 seconds, it is necessary to use a tripod to maintain stability, jitter will also lead to blurred photos, shooting failure.

4. The imaging quality of professional cameras (such as SLR cameras) is much better than that of ordinary cameras, but the key to taking good photos is people, not machines.