How to shoot the molten hole is clear to important people and background.

Tripod, small aperture, long exposure. It doesn't look good with a flash.

The use of flash is very professional and needs to be explored repeatedly. If you are just a traveler, not a professional photographer with many sets and flashlights, my advice is-let the model stand longer-do you remember what the photographer said when taking pictures before the 1980 s-now everyone should stop moving ~ exposure for n seconds does not necessarily blur the characters, of course, it should not exceed about 5 seconds, and it depends on the model's concentration.

If there is not enough light in the flash, the characters are black and cannot be seen clearly; If the amount of light is too large, it will lead to overexposure of bright places in the photo, so the background color light will turn white. You are a photometer and exposer, so the background color light must be overexposed. If you only use the flash instead of the reflector, it will cause the light to shine on the model from one direction, making the face look very stiff. You see, most people shoot people with card machines at night. In the absence of professional equipment, it is necessary to make full use of the diffuse reflection of natural light, or cover the flashlight with a layer of stockings or other translucent objects to weaken its "flashlight" effect.