How to take a photo of light graffiti (light painting photography)?

At least two friends can cooperate with each other to finish it, so it is more varied and more interesting. Light painting photography can be done indoors, at night, in \x0d\ or even in some dim light environment where it is impossible to take pictures at all. It doesn't need a special camera or lens, and almost everyone can take pictures. \x0d\ Light graffiti preparation: \x0d\ 1. It takes two people, one to take pictures and the other to draw patterns with light; \x0d\2。 Prepare a flashlight, a camera and a tripod. If you don't have a flashlight, you can change it to a mobile phone screen. If you don't have a tripod, you can also put the camera on a stool, table or railing. \x0d\ Light graffiti photography skills: \x0d\ 1. Take out the props above in opaque places; \x0d\2。 Set the camera to M, and select manual as the focus mode; \x0d\3。 Adjust the sensitivity to ISO 100, the shutter speed to a few seconds, and the aperture is about 8; \x0d\4。 The photographer presses the shutter, and another friend is facing the camera, drawing any pattern you want in the air with a flashlight! 5. Look at the photos! If the photo is too bright, reduce the aperture, if it is too dark, enlarge the aperture and try again! \x0d\ Light doodling tips: \x0d\ 1. Using ground reflection will have a miraculous effect; \x0d\2。 Wrap the toilet paper in front of the flashlight and paint it in various colors, and beautiful colored light graffiti will appear; \x0d\3。 Remember! Write the words backwards! \x0d\ Considering that light painting must be exposed for a long time when shooting, a camera with B-door shooting mode is needed. This is a necessary condition. Generally speaking, most digital SLR cameras, as well as single-camera and micro-single-camera \x0d\ have this B-door mode. Generally speaking, they will be set on the manual M file, and the shutter time will be set on the next \x0d\ after the slowest. According to the user's free setting, there is no need to set the exposure seconds before shooting. For light painting, because many \x0d\ creations need to be composed of a series of actions, it is impossible to predict the exposure time in advance, so it can be set to B\x0d\ exposure, which can greatly improve the freedom of shooting. In addition to the B door, some high-end models also provide a more advanced T\x0d\ door mode. The specific principle is to press the shutter to open and then press the shutter to close, and there is no need for a B door. As a demonstration prototype, when we use the wireless remote controller \x0d\ in the B-door mode, it is equivalent to enabling the T-door. The picture below shows the home-made remote control used by the author. As to where to sell \x0d\, as everyone knows, I won't explain it.