About shutter knowledge

shutter

Shutter is a device used in a camera to control the time when light shines on the photosensitive element of the camera. Shutter can be understood as a door, the door opens and light enters the camera. The door closed and the light stopped entering the camera. The opening and closing time of the door (shutter speed) affects the amount of light entering the camera, thus controlling the photo exposure.

Exposure; expose

Refers to the amount of light that enters the lens and shines on the photosensitive element during photography. When the shutter button is pressed, the camera completes the opening and closing process of the shutter curtain once, which is called an exposure.

1100 means that the current shutter speed is1100 second, which is equal to 0.0 1 second. If you change the value, you can adjust the shutter speed.

Shutter speed

shutter

For the shutter, the most important thing is to determine the exposure time of the camera. At the same sensitivity and aperture, the slower the shutter speed, the brighter the photo will be. On the contrary, under the same conditions, the faster the shutter speed, the darker the photo will become.

The faster the shutter speed, the shorter the light entering time, the less light entering and the darker the picture. The slower the shutter speed, the longer the light input time, the more light input and the brighter the picture.

Shutter application scenario

When shooting stars

Slow shutter takes pictures of stars, and ultra-slow shutter takes pictures of star tracks. Shooting skills: To shoot a little starry sky, you can use the slow shutter of 10-25s. If you slow down the shutter for a few minutes, for example, you can take a "star track" photo! However, in the era of digital photos, the method of photo combination is generally used to shoot the orbit of stars, which has better effect and higher quality.

Take pictures during the day

Use low-speed shutter shooting skills when there is enough light in the daytime: If you want to turn a crowded street into an empty crowd with an ultra-slow shutter, for example, if the shutter opens for more than five minutes, you need to adjust the aperture to a small size, and you need to use a reducing mirror to reduce the light entering the camera sensor. A stable and reliable tripod is also essential.

Drainage water

Beating water: high-speed shutter solidifies waves. Slow-door atomization shooting skills: When shooting running water, the shutter can clearly shoot the waves hitting the stone, making the photo more imposing. A slow shutter can atomize running water to produce a silky effect.

Beat movement

Fast shutter solidification action, slow shutter shooting dynamics. Shooting skills: When shooting some fast-moving sports, such as football, skating, racing, etc. Fast shutter can also shoot different effects. The fast shutter can instantly freeze the action of the target, so that the action at that moment can be clearly photographed. Shutter speed depends on the moving speed, and sometimes it is necessary to use 1/65438+.

Ambient light and shadows

The light is strong, use a fast shutter, and the light is not enough. Use a slow shutter, provided the Iso and aperture remain the same.

The speed of the object being photographed.

When shooting a freeze frame, use a faster shutter speed equal to or faster than the moving speed of the object, and use a slower shutter speed equal to or faster than the moving speed of the object.

Your own security shutter

Safety shutter: In general, the slowest shutter speed when shooting by hand without pasting photos. Theoretical calculation formula: safety shutter = 1/ lens focal length.

Shutter speed summary

The focal length is 200mm, and the safety shutter is 1/200s. Focal length 100mm, safety shutter1100s, focal length 50mm, safety shutter 1/50s. The focal length is 35mm, and the safety shutter is 1/50s (not less than 1/50s). Focal length 18mm, safety shutter 1/50s (not less than 1/50s).