Camera shutter

Shutter is a device that lets light pass in a short time. If the aperture controls the area through which light passes, the shutter controls the length of time through which light passes. This means that the longer the shutter is open, the more light passes. Faster shutter speed means that the shutter opens and closes quickly, allowing only a small amount of light to pass through. A slower shutter speed means that the shutter is open for a longer time, allowing more light to pass through.

Traditionally, the shutter speed of a photo camera is calculated in seconds and the time interval is fixed. The difference between shutter speed and light quantity is linear, that is to say, if the speed is doubled, the light quantity will be doubled-if the speed is reduced by half, the light quantity will be reduced by half.

The standard shutter speed of most professional cameras (seconds):1/2000 _1000 _1/500 _1/250 _/kloc-0. 1/4_ 1/2 _ 1 _ 2 _ 4 _ 8 _ 15 _ 30 _ 60 _ 125 _ 250 _ 500 _ 1000 _ 2000。

Extended data

Use skills

1, the basic skill of pressing the shutter

Stretch out your right hand, only bend the first section of your index finger downward, and control the other fingers not to move!

Press the shutter, as long as it is this big. In other words, you can only tap, press and press lightly, but you can't knock, hit or shake hard.

2. Try to find support.

When taking pictures, you should not only practice basic skills, that is, holding bricks with one hand, but also try to find a bracket, such as a tripod. If the photographer doesn't have a tripod, try to find tables, big stones, columns, trees, corners, etc. As a support for the shooting scene.

3. Control your breathing

Learn to control your breathing when filming. Before you press the shutter, you should take a breath and hold your breath. You shouldn't breathe. Press the shutter and exhale. Be calm when taking pictures, control your emotions and don't be nervous.