What do you mean by long exposure of the camera?

Long exposure photography is a kind of photography technology that opens the shutter for a long time. It is often used for night photography, ray photography and waterscape photography.

The "B-door" and "T-door" of the camera can be exposed for a long time, which can be used to get exposure for a few seconds, minutes or even hours. They are necessary shutter functions for celestial photography and fireworks night scene shooting. Digital cameras sold in the market only have B-door, but not T-door, while some small portable digital cameras do not have the functions of B-door and T-door.

Long exposure is an exposure mode with slow shutter (long exposure time). The advantage is that you can shoot dim scenery more clearly, and you can also shoot fantastic pictures, such as waterfalls and city roads at night. Long exposure photography needs to use a long shutter speed to capture the image blur of fixed elements, while moving or blurring ugly elements.

1, night photography

Long exposure photography, usually used for night photography, to produce photos different from those during the day. By extending the shutter opening time of the camera, you can absorb more light and create a clearer picture. Usually fixed with corner frames to avoid ambiguity. And enlarge the aperture to avoid underexposure, resulting in dark photos.

2. Radiography

With this technology, the scene will remain quite dark, and the photographer or assistant will take a light source, which can be a small flashlight, and move it to draw a picture. The light source can be turned off between different strokes. Objects in the scene that don't usually move will be depicted by briefly turning on studio lights, one or more flash lights or gradually expanding apertures.

3, waterscape photography

Long-time exposure photography can blur the moving water and keep the clear sense of static objects, thus showing the dynamics of water flow.