Dynamic photography

I'm sure many people have seen this kind of photos.

Most people will think that it is achieved by post-superposition.

In fact, it is a photo that can be taken at

I'm sure many people have seen this kind of photos.

Most people will think that it is achieved by post-superposition.

In fact, it is a photo that can be taken at one time by the previous means.

So how was it filmed? Why do people get heavier?

And there is an image superposition between the two, which has an illusory effect?

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In fact, this cool way of shooting is called

Stroboscopic photography

(stroboscopic photography)

? Now let's learn stroboscopic photography.

The framework of the article is as follows, and friends can read it selectively.

? 1. strobe photography principle

The word "strobe" sounds daunting and super-tech, but in fact it means "taking pictures with an external flash". Stroboscopic photography, also known as continuous flash photography, as its name implies, is to record the continuous motion process of moving objects on the screen with the continuous flash of electronic flash.

Its basic principle is to use a high-power external flash to continuously illuminate the foreground in a high-frequency way, and the trajectory and details of the moving object in the next frame will stay on the camera sensor board exposed for a long time. Therefore, the effect of stroboscopic photos is related to the flash performance, flash parameters, the degree of reflection of the subject, the moving speed of the subject and the shooting background.

2. Equipment preparation

? Camera: Needless to say, the camera is important for the whole shooting.

Tripod: Shooting will involve shooting at Gate B, so tripod is an essential prop.

Flash: the electronic strong point works best, and it doesn't matter if it doesn't exist. It can be realized by multiple flashlights or reflectors. See the third point for the specific implementation method.

Black background: When the flash flashes, not only the main body is illuminated, but also the background is illuminated. If the background is too white or too bright, the picture will be unclean or even overexposed. If you don't want to deal with these problems later, you'd better make sure the background is black.

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3. Shooting method

Electronic strength shooting

Electronic spot is a new type of photographic lighting equipment. When it is fully charged, it can blink as frequently as a pistol. The flashing frequency of the high-frequency electronic stick can be adjusted as required. The higher the flash frequency, the more exposure times of the film, and the more images appear in the photo. Generally speaking, this kind of lamp can flash dozens or even hundreds of times per second. When shooting a moving object with an electronic support point, dozens of overlapping and patched images can be left on the screen. These images generated every once in a while can give people a strong visual feeling of rhythm, which can make people feel novel, because the visual effect of freezing scenes on a high-speed frequency screen is usually invisible to the naked eye.

When taking stroboscopic photos with electronic strong spots, you should choose a black background, and the subject should be as far away from the background as possible to avoid stroboscopic lights illuminating the background, thus affecting the effect of the subject. If the subject is close to the background, it is best to let the flash and the subject form the illumination angle of side light and side backlight, and the subject also has obvious contour lines, so as to prevent the colors of the image and the background from mixing.

Ordinary flash shooting

If there is no electronic strength, it can be realized by ordinary flash. First, multiple flashlights are used to form a group of light sources to take stroboscopic photos. Because the shooting interval of flash group can't be very close, only a few complete and clear images can be taken by continuous flash with ordinary flash group, and the images generally don't overlap each other, so the sense of movement and rhythm is poor. ?

4. Edit shooting precautions

Before shooting

Before shooting, we must first determine how many images to leave on the screen, how far apart, whether to use virtual shadow connection and so on. , and then decide the position and quantity of the flash.

Secondly, choose a dark background first. It is usually better to shoot at night with a low angle and a dark sky as the background, or find a spacious room to ensure that the images of moving objects are not disturbed.

In addition, in order to make the picture clean and the main body stand out, it is best to turn off all other light sources except the flash for main lighting. In order to let people know the direction of movement, a small number of very dark lights can be placed on the scene, and the light source should be as close to the ground as possible, with a reverse light irradiation angle with the disturbed object.

When shooting officially

When shooting formally, open the B door of the camera, release the lock with the cable, make the shutter of the camera open, and then let the moving body start to move. The photographer controls the flash by hand and flashes one by one according to the different movement postures of the moving body.

If you need to take three shots, flash three times with three flashlights; You need to take six images, which can be flashed twice with three flash lights or six times with six flash lights. It is best to find multiple assistants to operate flash separately. After reaching a tacit understanding, the effect is also very ideal.

If the motion speed of the moving object is slow and the motion process is long, then a single ordinary flash can be used to shoot. This stroboscopic method is to fully charge the flash, lock the camera door B, let the flash flash at the moment when the moving body starts to move, and record the first image; When entering the next shape, flash again and record the second image; In this way, after a photo passes through multiflash, it will leave a number of moving human images with different postures.

How to master the exposure of stroboscopic photography?

If several images are separated from each other, the exposure is calculated according to the usual single lamp flash. If several images are closely connected and partially overlapped, the exposure of these images will increase with the increase of flash times. Therefore, when overlapping flashes, the exposure should be reduced by 1-2 aperture.

In addition, in order to provide a larger range of activities for the moving body and facilitate the recording of the movements of the moving body at various stages, it is best to use a wide-angle lens when shooting.

In order to be more sure, it is best to conduct several experiments before shooting, so that the moving body or character can practice several times more within a certain shooting range, so that the two sides can cooperate with each other and the shooting can be sure. Once you know the principle and method, you can act quickly. After you are familiar with the operation, you can play, extend along the train of thought and find more diverse ways to play. ?

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(Image from the Internet)