Do you know the basic knowledge you need to learn about the SLR -B door mode that can be controlled at will?

Photographers who like long exposure should be familiar with the camera's door B. For beginners of photography, the camera door B seems a bit strange. I'll talk to you about Gate B today, hoping to help you.

What is gate b?

B-door, full name of light bulb, is a shooting mode that can manually control the exposure time, especially the exposure time can exceed 30 seconds, also known as manual shutter mode.

In fact, the manual exposure of door B is similar to that of file M. The only difference is that the exposure time of file M can reach 30 seconds, while that of door B can exceed 30 seconds. The power is enough to keep exposure, but it is harmful to the camera.

What are the operating instructions for door B?

Door B is mostly used for shooting long-exposure subjects, or under low light conditions, it is necessary to pay attention to stabilizing the camera and anti-shake settings.

1 with tripod and cable release device

When shooting at Gate B, the shutter speed used is slow. In order to stabilize the camera, it is generally necessary to use a tripod to stabilize the camera to avoid hand shaking and affect the shooting effect.

At the same time, the use of cable release can avoid the jitter caused by hand pressing the shutter, and now there is a shutter remote control, which can directly set the exposure time and other parameters, which is more convenient for our shooting needs.

2, turn off the lens anti-shake

Many lenses are equipped with anti-shake function to reduce the influence of jitter during hand-shooting, but when using a stable device (such as a tripod), it is necessary to turn off the lens anti-shake.

3. Pre-lift mirror or real-time display shooting

If your camera is a SLR camera, you need to pre-lift the mirror or display it in real time to reduce the slight jitter caused by the mechanical vibration of the mirror. Micro-cameras can ignore this.

What should I shoot at Gate B?

What should I shoot at Gate B? Almost all slow door themes can be filmed.

The water surface is not calm, and the effect of shooting horizontally like a mirror through long exposure;

There are clouds in the sky, and Gate B can record the effect of them.

Weak light environment such as night scene, starry sky and star track is also commonly used in door B;

When the traffic volume is small, shooting the trajectory of the light, door B can bring very good results;

Of course, complex light painting shooting also needs the support of B-door exposure time of more than 30 seconds.

What other applications do you think of door B?