When taking pictures, you will mostly hear a single click, but that’s because your shutter speed is typically so short that you do not hear both shutter curtains engaging at the beginning and the end of the exposure. The front curtain opens up at the beginning of every exposure to let light in, whereas the rear curtain basically closes at the end of the exposure, blocking light from reaching the sensor.
What is Electronic Front-Curtain Shutter?Ī typical mechanical focal-plane shutter is comprised of two curtains, known as “front curtain” and “rear curtain”. Let’s take a look at EFCS in more detail. However, if your camera has a feature called “Electronic Front-Curtain Shutter” (EFCS), you can eliminate blur from shutter shock completely in your images. So if your camera has a damped shutter mechanism and you are using relatively fast shutter speeds or very slow shutter speeds longer than 1 second, you should be able to avoid shutter shock in your images.