- Aug 12, 2018 -
To learn photography, you need to know these 10 photography knowledge (first part)!
Many beginners in photography always have problems with this or that. Today, I will summarize the 10 photography knowledge most frequently asked by beginners. The 10 photographic knowledge are: what is the focal length, what is the aperture, what is the depth of field, how to control the shutter, how to compose the picture, how to use the light, how to focus, the golden time to shoot, eliminate the shadow, and enhance the aesthetic.
First, the focal length
You don't have to look at the official terms when you understand the focal length. There are few people who can understand and understand. You only need to understand the focal length as: How far or how wide a lens can be. The smaller the number, the shorter the focal length and the wider the viewing angle; the larger the number, the longer the focal length and the narrower the viewing angle.
For example: a 300mm focal length lens with a viewing angle of only 8°; and an 8mm super wide-angle lens with a viewing angle of 180°. Generally, lenses with a focal length of 24 mm or less are suitable for shooting landscapes, while lenses with focal lengths of 50 mm and 85 mm are suitable for portraits.
Second, the aperture
The aperture is a light hole formed by overlapping small blades inside the lens, and the aperture can adjust the amount of light received by the image sensor according to the degree of opening and closing. For example, if the aperture is open, a large amount of light is passed; if the aperture is reduced, the amount of light can be limited. The aperture is generally indicated by "F", and the number behind F represents the size of the aperture. The larger the number behind, the smaller the aperture; the smaller the number, the larger the aperture.
In addition, the aperture also affects the depth of field of the photo. The greater the aperture, the shallower the depth of field is, the more blurred the background of the photo. The smaller the aperture, the deeper the depth of field, the clearer the background of the photo.
On the left is a large aperture (f/1.4); on the right is a small aperture (f/16)
Aperture size affects depth of field
Third, depth of field
The terminology of the depth of field is explained by the fact that the front and back distances of the subject measured by the front edge of the camera lens for clear imaging are actually the degree of clarity between the subject and the background.
In addition, there are three elements that determine the depth of the scene: the aperture size, the distance of the shooting distance, and the length of the lens focal length. Next, let's talk about how these three elements affect the depth of field.
1 aperture size
The larger the aperture, the shallower the depth of field, the smaller the aperture and the deeper the depth of field.
2 shooting distance
The closer the subject is to the lens, the shallower the depth of field; the farther the subject is from the lens, the deeper the depth of field.
3 focal lengths
The longer the focal length, the shallower the depth of field, the shorter the focal length and the deeper the depth of field.
Fourth, the shutter speed
In simple terms, the shutter speed indicates how long the light illuminates the image sensor. In general, the size of the aperture determines how much light can enter the camera during the same time; and the amount of shutter speed determines how long the sensor is exposed. The speed of the shutter speed: the smaller the denominator, the slower the shutter, the larger the denominator, the faster the shutter. For example, the shutter speed is 1/3 second, which means that the exposure is one-third of a second. This exposure time is very long. The shutter speed is 1/200 second, which means that it is two hundredths of a second. This exposure time is very short.
Shooting the same subject at different shutter speeds will produce different effects. For example, the photo of the waterfall below. Photographs taken with high-speed shutters are vibrant, while photos taken with slow shutter speeds fully express the flow of water, creating a calming atmosphere.
Focusing is the process of sharpening the subject's image by changing the position of the animal's distance and distance from the camera's focusing system. In order to help everyone master the focus, the following will explain the focus knowledge for everyone.
1 One-Shot AF: This focus mode is suitable for shooting still objects. The camera will focus on the subject halfway, and the camera will focus once.
Single servo mode for shooting still subjects
2 Continuous autofocus: Continuous autofocus is the camera will lock the target or lock the focus area after half-pressing the shutter. Once the focus distance between the target and the camera changes, the camera will automatically focus again. Continuous autofocus is best for shooting in sports, such as sports photography, wildlife photography, and car commercials.
Continuous autofocus is suitable for shooting moving subjects
3 Intelligent Auto Focus: This mode combines single focus and continuous focus. When the shutter is pressed halfway, the subject at the focus can be locked for single focus, and the main body can also switch to continuous autofocus for tracking shooting. A more random way of the object.
Smart AF is a combination of single focus and continuous focus
4 Manual Focus: Manual Focus is a method of adjusting the camera lens by turning the focus ring by hand to make the captured photos clear. The letter AF (Auto Focus) means auto focus, and MF (Manual Focus) means manual focus. Manual focus is especially effective when shooting in macro photography, special effects shooting, or in dimly lit environments.
Set the focus mode switch on the AF lens to “MF”