Aperture is a fundamental aspect of photography. It refers to the opening in the lens through which light enters the camera. The size of the aperture can be adjusted to control the amount of light that reaches the image sensor. A larger aperture allows more light to enter, resulting in a brighter image, while a smaller aperture restricts the amount of light, resulting in a darker image. Aperture also affects the depth of field, which is the range of distance in a photograph that appears sharp and in focus. A wider aperture creates a shallow depth of field, with only a small portion of the image in focus, while a narrower aperture creates a deeper depth of field, with more of the image in focus. Understanding aperture is essential for achieving proper exposure and controlling the creative aspects of photography.

Sep 13, 2023#photography #aperture56

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The aperture is the opening in a camera lens that controls the amount of light passing through. It affects the depth of field, with a larger aperture creating a shallower depth of field. In portrait photography, a larger aperture is often used to blur the background and focus on the subject. In landscape photography, a smaller aperture is used to ensure everything is in focus. The aperture also affects the exposure time and can require adjusting the ISO sensitivity. In summary, the aperture is an important factor in photography, especially in portrait and landscape shots.

What is Aperture?
We often hear about "aperture priority mode," using a large aperture for better blurring in portrait photography, and how aperture affects exposure, and so on. Aperture refers to the opening size in a camera lens that controls the amount of light passing through. It is represented by the f-value, where a smaller f-value means a larger aperture, and a larger f-value means a smaller aperture.

It affects depth of field.
Depth of field, also known as focus range, refers to the range of objects in focus. A shallow depth of field means only a small portion is in focus, while a deep depth of field means most of the scene is in focus. Generally, a large aperture is used in portrait mode to create a shallow depth of field, where only the subject is in focus while the background and foreground are blurred. In landscape photography, a small aperture is used to achieve a deep depth of field, where everything is in focus.

Why?
Light passes through the lens and forms an inverted image, and the size of the aperture affects its distribution. A large aperture allows more light to pass through, while a small aperture restricts the amount of light.

It also affects the amount of light entering.
It affects the exposure time, where a large aperture shortens the exposure time, and a small aperture lengthens it. If the exposure time cannot be further extended, the ISO sensitivity needs to be increased, which can introduce noise.

Summary:

Portrait photography usually uses aperture priority mode and a large aperture to highlight the subject and blur the foreground and background.
In aperture priority mode, after adjusting the aperture, the camera automatically adjusts the exposure time and ISO sensitivity.

Reference:
https://snapshot.canon-asia.com/tw/article/zh_tw/camera-basics-1-aperture