Màn trập là gì? Ý nghĩa của tốc độ màn trập

Have you ever wondered what the shutter in your camera actually does? It’s a crucial part of photography, but many people are not aware of its significance. In this article, we will explore the concept of shutter speed and uncover its secrets. So, let’s dive in!

What Exactly is the Shutter?

What is the shutter?

The shutter, also known as a curtain, is a metallic screen positioned in front of the sensor. It plays a vital role in controlling the amount of light that reaches the sensor.

Understanding Shutter Speed

Shutter speed refers to the time it takes for the shutter to open and close, allowing light to contact the film or the sensor. It determines the speed at which the image is captured. In simpler terms, it’s the duration during which your camera records an image.

Shutter speeds are measured in seconds. When you look at your camera settings, you’ll see numbers like 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500, and so on.

The Meaning of Shutter Speed

The relationship between shutter speed and aperture helps regulate the amount of light that reaches the sensor. When there’s a significant amount of light (large aperture), a shorter exposure time (fast speed) is required to capture enough light for a bright image. Conversely, if you’re working with the same light intensity, different combinations of shutter speeds and aperture values can give you the same amount of light.

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Shutter speed and ISO also have a connection. These two parameters work together to control the amount of light entering the camera. Increasing the ISO can compensate for a slower shutter speed, but it can introduce graininess in low-light situations. To mitigate this, it’s recommended to reduce the shutter speed or adjust the aperture.

Another critical aspect of shutter speed is its impact on exposure. A slower shutter speed allows more light to hit the sensor, resulting in a brighter image. On the other hand, a higher shutter speed limits the exposure, leading to a darker image.

Shutter speed and exposure

Different Types of Shutters

There are various types of shutters used in cameras. One common type is the focal plane shutter, which consists of two black screens made of stacked steel sheets. These screens move to expose the sensor to light before retracting to block it.

Another type is the blade shutter, found inside the lens. It works by opening and closing rings of steel sheets according to the desired aperture size.

Calculating Shutter Speed

Shutter speed is typically expressed as a fraction of a second, indicating how long the shutter remains open. For instance, 1/60 second and 1/250 second are common examples.

The higher the denominator in the fraction, the faster the shutter speed. Using a faster shutter speed is recommended when hand-holding the camera to avoid shaky images. For situations that require slower shutter speeds, it’s best to use a tripod.

Locating the Shutter Speed on Your Camera

Where is the shutter speed displayed on the camera?

Shutter speed is typically indicated in the upper left corner of the LCD screen on cameras equipped with one. If your camera lacks an LCD screen, you can find the shutter speed in the bottom left corner of the viewfinder. For mirrorless cameras, simply look at the rear screen.

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Still can’t locate your shutter speed? Set your camera to aperture priority mode and disable auto ISO. Then, point your camera from dark areas to highlights. The number that changes is your shutter speed.

To summarize, the shutter is a fundamental component of photography. Understanding shutter speed empowers you to create captivating images with appropriate exposure and effects. We hope this article has provided you with valuable insights into the fascinating world of shutters. For more exciting articles on photography, visit Caravansarai. Happy clicking!