Traditional Culture Encyclopedia - Photography major - How to use the flash of a digital camera?
How to use the flash of a digital camera?
The flash integrated with the body is called a "built-in flash", also known as an on-camera flash. It can be said to be one of the most flexible fill-light styling tools. When shooting with a digital camera, if the flash is used properly, the quality of the photo will be significantly improved. Even some popular digital cameras are equipped with on-board flash. It is necessary for photographers to study and use the on-camera flash.
The built-in flash of a SLR camera 1. The illumination should be sufficient when used as the main light
This is one of the most important purposes of using the flash. The main purpose of using the flash as the main light is for shooting In scenes with low illumination or even no ambient lighting at all, flash can be used to achieve accurate exposure and record the details of relevant objects. Generally, if a digital camera uses a program file to shoot in a dark environment, the camera will activate the flash on its own. However, photographers can also make adjustments through the menu in advance to meet special needs according to actual conditions. For example, when the shooting distance is long and the space is large, the camera's onboard flash index is small, which is obviously difficult to meet the needs of long-distance lighting in large scenes. In addition, the flash output should be adjusted to the "enhanced" mode (a "+" sign appears in the picture). ), the sensitivity should also be raised (although the quality of photos taken with high sensitivity will be affected to a certain extent, it is much better than severe underexposure). Through integration, the exposure can be significantly improved.
2. Reduce the flash to prevent overexposure
This is contrary to the above needs. It is necessary to prevent overexposure when shooting some scenes. For example, when shooting in a very small space, shooting an object that is too close, or using it as fill light in a backlit environment, you must prevent overexposure. Before shooting, the flash mode should be adjusted to the "weakened" position (a "-" sign appears in the picture), and the camera sensitivity should be lowered accordingly. Generally, the lowest sensitivity of popular digital cameras is equivalent to ISO100, and a few are ISO64. There is no more choice. If there is still a possibility of overexposure, you should choose the manual "M" mode or the aperture priority "A" mode to shoot. You can adjust the aperture to the minimum. Generally, the minimum aperture of a portable digital camera is F8, and the minimum aperture of a digital SLR can reach about F22. This can be effective Avoid overexposure.
If the above method is not effective when taking close-up shots, you can use translucent media such as plastic bags and napkins to cover the flash in front of the flash. Through appropriate blocking, the flash intensity can be significantly reduced. When shooting in macro mode, the shooting distance is often less than 10cm. Even if the sensitivity is adjusted to the lowest and the aperture is adjusted to the smallest, it may be overexposed. The only way to solve the problem is to block the flash. Of course, using different media to cover will have different effects, which requires the photographer to experiment in advance to prevent shooting errors.
3. Forced flash for fill light
In a sense, digital photography has far higher requirements for exposure accuracy than traditional photography, especially if there is no appropriate auxiliary light in the dark parts of the picture. When lighting, it shows a lack of layering and obvious noise. If you zoom in a little, "graininess" will easily appear. In order to enrich the layers of photos, photographers need to be good at controlling the flash and implement forced flash when necessary.
The purpose of the flash fill-in forced flash in backlight situations is to change the contrast of the subject. For example, when shooting backlit portraits in natural light, or when shooting people in front of translucent curtains indoors, the camera often changes due to the background. It is believed that high brightness will automatically reduce the exposure, which will eventually lead to underexposure of the subject, especially the face of the person, which will lack details due to underexposure. Using forced flash to fill in the front of the character can significantly improve the gradation. When using forced flash, the photographer should make appropriate adjustments to the camera according to the actual situation. If you find that the fill light is too strong, you need to increase the telephoto distance or weaken the luminous intensity; if you find that the fill light is obviously excessive, you can switch the camera to manual mode and shrink the aperture appropriately (and reduce the shutter speed accordingly to ensure the background exposure) So that the subject can get more appropriate fill light.
4. Forced non-flash to preserve light effects
Photographers encounter various situations during shooting, and they will inevitably encounter shooting requirements that require them to avoid flash, that is, under forced non-flash conditions The photographer controls the exposure by himself, so as to achieve the effect of maintaining the original light characteristics.
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