Why can black cards read shadow answers?

With the improvement of camera performance, perfect function and rich accessories, the role of black cardboard in photography is becoming less and less known. Today I will briefly talk about the role of black cardboard in photography.

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Black cardboard can be the most effective assistant when shooting night scenes. When shooting night scenes, due to long exposure (even 10 hour), there will be strong light or intermittent different light sources during the long exposure of the camera, which will greatly affect the shooting effect. At this time, black cardboard can be used to block the position where strong light appears and remove unnecessary light sources in composition shooting.

Difficulty in shooting: Pay attention to the time and position when covering with cardboard. Generally, shielding is not needed at the initial stage of exposure. When you encounter complex and strong light sources during shooting, you can cover them with black cardboard.

Recommended shooting theme: Black cardboard plays a very important role in night architectural photography and night city photography. Especially when shooting buildings at night, you can create clean and attractive architectural photos through the cover of black cardboard.

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Shake the black card to control the light input and exposure of the lens.

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As shown in the figure, the luminosity data of the sky and the ground are different, and the light and shade will be very clear when taken directly. Shake the black card to control the exposure time of the bright part! Try more, it's a technical job!