Steps and Skills of Film Photography Assisting Flash Portrait Shooting

Auxiliary flash is also called flash auxiliary light. Flash plays an auxiliary role in the main light, which can make up for the defects of too large light ratio of the subject and too strong contrast between light and dark caused by the main light, adjust the contrast of the picture, make the shadow part of the picture get proper illumination, and at the same time make the texture details of the shadow part or highlight part get proper expression, enhance the texture and make the shadow fade. The number of auxiliary flashlights can be one, two or more, depending on the shooting needs. The auxiliary flash direction is generally 60 degrees left and right of the camera. Between the two angles, the light is 30 degrees above the horizon. Within the depression angle. In order to avoid diluting the effect of the main light because the auxiliary flash is stronger than the main light intensity, the contrast should be appropriately reduced, but it should not be too weak, otherwise it will not show the hierarchy.

Specific shooting steps of auxiliary flash portrait

Measure the highlights of the main characters (note: the exposure cannot be overexposed or underexposed. Overexplosion will make the highlights lose the sense of layering, and insufficient will make the light ratio of the auxiliary flash uncontrollable, and even make the auxiliary flash dilute the continuous light source effect)

The main body is filled with flash light, and under the same sensitivity, the light source intensity of flash light is weaker than the aperture value of continuous light source exposure combination by 1 ~ 3 steps, so that the portrait effect of auxiliary flash light with different light ratios can be obtained (Note: if a full-automatic set-top box or an external flash light is used, the flash exposure mode can be set to full-automatic state, and the flash exposure compensation by 1 ~ 3 steps can be reduced, so that the portrait effect with different light ratios can be obtained.

point out

Light ratio, that is, the ratio of highlight to shadow of the subject, is the simplest explanation for quantifying light ratio in photography, and it is the relationship between light ratio and exposure difference. For example, the step changes of sensitivity values are ISO 100, ISO200, ISO400 and ISO800. The difference between ISO 100 and ISO200 is a full-step exposure (1EV), and the light required by ISO200 is 1/2, so when the difference between highlights and shadows is a full-step exposure (1EV), By analogy, the difference between ISO 100 and ISO400 is 2EV, and the light ratio is 1: 4. The difference between ISO 100 and ISO800 is 3EV, and the light ratio is 1: 8. When the light ratio is above 1: 8, the dark part will easily lose its layering and even tend to be completely black. Therefore, when shooting, the light ratio of the area to be represented is mostly controlled within the range of 1: 8. (For a detailed description of the light ratio, please refer to the chapter on measuring the light ratio of a basic triangle).

Key points of landscape shooting

In the actual operation of photography, many beginners have weak control over the scenery, so they pick up the camera and shoot. Sometimes the effect is good, sometimes it is unsatisfactory, and sometimes they even feel that they don't know where to start. In fact, whether shooting people or shooting scenery, there are its rules and points.