Flash back curtain synchronization, you really use it? Take a dynamic picture of “combination of virtual and real”

Rear curtain synchronization refers to that when the front curtain is opened, the flash does not flash at first, but it flashes and completes the exposure only at the moment before the rear curtain is closed. < / P > < p > it is mainly used for shooting activities with relatively sports tendency and active subjects, such as people, sports vehicles, animals, sports and dance themes, to show the dynamic of light and shadow, and to keep the theme clear at the last moment. < / P > < p >} the rear curtain can also be used to record dynamic pictures. In addition to the dynamic pictures mentioned above, when shooting flowers, the rear curtain can give a dreamlike effect according to the control of on-site exposure. < / P > < p > in addition, here is a special mention of the use of flash in photo portrait photography. During the actual shooting, the character is in a state of immobility after posing during the exposure time. As long as the character moves slightly during the shooting process, it will produce the effect of dragging shadow, which is also a relatively difficult point. Therefore, we can use the rear curtain of the flash to synchronously “fix” to get the last one after light painting A clear character, and the flash plays a role in filling the light. < / P > < p > the same method is also effective in the shooting of night scene portrait, and the shutter speed is slow when shooting night scene portrait. During this period, the model may move and produce virtual image in the photo. Using the rear curtain synchronization mode, that is, the flash lights up when the shutter is about to close. This mode can effectively solidify the model’s motion, even if there is a slight displacement during the exposure time, it will not be recorded. < / P > < p > it should be noted that the flash lamp is usually parallel to the subject in order to make the upper and lower parts even. However, it should be noted that when there are reflective objects such as glass behind the subject, the shooting angle of the camera should be appropriately changed to shoot from the side, so as to avoid bright spots. In a word, the slow door only records the track formed during the whole moving process, while the synchronous rear curtain of the flash lamp will fix the last action, forming a sense of ending. Developed a “plug and play” solar power generation scheme, and “5B” won a $12 million round a financing