快门 (kuàimén): shutter (of a camera)

Measure Word

一个快门 gè

HSK 7-9

摄影师按下快门，抓住了那个精彩瞬间。

Shèyǐngshī àn xià kuàimén, zhuāzhù le nàgè jīngcǎi shùnjiān.

The photographer pressed the shutter and captured that wonderful moment.

HSK 7-9

慢速快门可以拍出光轨效果。

Mànsù kuàimén kěyǐ pāi chū guāngguǐ xiàoguǒ.

A slow shutter speed can produce light trail effects.

memory

快 means fast and 门 means door/gate. The shutter is literally a 'fast gate' - a door that opens and closes at high speed to let light in.

快 kuài

门 mén