Hello everyone, welcome to the Frog Color VR series of panoramic photography courses!
(Bokeh photo)
We often see such photos on TV or in books. The main body of the photo is clear, the front and rear mirrors are hazy and blurred, and the overall look is very beautiful.
How did such a photo come about? Which parameter in the camera is related to it? In this lesson, we will take you to understand aperture, one of the three elements of exposure.
1. What is aperture
(the process of opening the aperture)
Aperture is a photographic term that is used to control the amount of light passing through the lens into the photosensitive surface of the body, which is usually inside the lens.
For the manufactured lens, it is impossible for us to change the diameter of the lens at will, but we can control the amount of light passing through the lens by adding a polygonal or circular grating with a variable area inside the lens. This device is called the aperture.
2. The effect of aperture on photos
Aperture has two main effects on photos, one is the amount of light entering the lens, and the other is the depth of field of the photo (depth of field refers to the size of the clear range on the photo).
(aperture and depth of field)
We can think of the aperture as the pupil. For example: During the day, the pupils of cats always shrink into a line, and at night, they automatically open into a round hole.
This is because during the day when there is enough light, the pupils open too much, and too much light will cause glare. There is little light at night, and the opening of the pupil is conducive to the entry of light, which is convenient for observation at night.
Friends who suffer from myopia, if they don’t wear glasses, always squint their eyes to look at things habitually, so they can see things more clearly. Applying the terminology of photography, this is called: narrowing the aperture (pupil) and increasing the depth of field!
(Comparison of screen brightness and depth of field with different apertures in the same scene)
3. Application of Aperture in Actual Shooting Scenes
Which aperture you choose to take a photo depends on what effect you want to shoot. Now everyone should know how the photos we mentioned at the beginning of this lesson were taken. That's right, use a large aperture. But the large aperture is exactly what we want to avoid when shooting panoramas! ! !
You can imagine that if we use a large aperture to take a picture of a building, we will get a picture of a clear building nearby and a hazy background in the distance, which obviously does not meet our shooting needs.
Therefore, we generally use an aperture of F/8 or smaller when shooting a panorama to ensure a large depth of field while getting a certain amount of light, so that the overall picture is clear and bright.
Let’s stop here today for the introduction of the aperture. Although the large aperture is beautiful, everyone should use the appropriate aperture according to their own needs!
下期为大家带来曝光三要素—快门速度课程，或者进入蛙色3DVR平台提前查看全部教程！