Photo album lesson 2 understanding of SLR aperture how to shoot with aperture

Beginners always have a doubt when buying lenses. Is the aperture bigger, the better? In fact, the larger the aperture of the lens, the more light enters the lens, and the shorter the exposure time of the camera. Moreover, compared with small aperture, large aperture has better background blur effect. This shooting method can make the main body of the image more prominent and the whole more concise. Moreover, the background blur effect and depth of field effect of photos taken by lenses with larger aperture parameters are more intuitive and obvious. In addition, compared with similar lenses, lenses with larger apertures have greater luminous flux and can shoot wonderful images in poor light. Therefore, if the budget allows, try to choose a lens with a larger aperture.

How to set the best aperture of the lens

Generally speaking, the maximum aperture value of this lens is reduced by 1-2 steps, which is the range from f/4 to f/8 of the lens. The best aperture of the lens is the best balance point of aberration and diffraction of this lens, and the best image quality can be obtained by taking pictures with the best aperture value.

How to control depth of field through aperture

The depth of field directly reflects the depth of a photo, and the most commonly used method is portrait shooting. When the background is blurred, the characters naturally stand out. Generally speaking, we will consider controlling the depth of field through the aperture. But the depth of field is not only determined by the aperture. Besides the aperture, we also need to choose the focal length to control the depth of field. Depth of field is actually related to aperture, focal length and shooting distance. The larger the aperture value, the greater the depth of field; The longer the focal length, the shallower the depth of field; The smaller the shooting distance, the smaller the depth of field.

What is the use of aperture priority mode?

When using aperture priority mode, the camera will determine the aperture value of the lens before doing other work. This mode allows the novice to adjust the aperture size independently, and then the camera automatically determines an appropriate shutter speed according to the shooting conditions at that time and the set aperture value to achieve more accurate shooting results. When you can't consider the influence of too many factors on the image, you can adopt aperture priority mode, so you only need to determine what the subject is and how blurred the background is. These factors are only related to the aperture size of the camera (without changing the lens).

How to match aperture and shutter

The main function of aperture and shutter is to control the exposure of the camera, but the difference is that aperture will also affect the depth of field of the camera, and the shutter of the camera will affect the imaging quality of the photo. The larger the aperture, the shorter the depth of field and the greater the exposure; The smaller the aperture, the longer the depth of field and the smaller the exposure. The slower the camera shutter speed, the greater the exposure; The faster the speed, the smaller the exposure, which means that the faster the shutter speed of the camera, the clearer the object can be photographed. In actual shooting, only the cooperation of aperture and shutter can achieve the best effect.

Which is better, aperture priority or shutter priority?

These two modes can't be visually compared at all, and they should be decided according to the subject. Relatively static, when paying attention to the influence of depth of field, it is recommended to use aperture first; Preferred shutter for sports theme and snapshot theme.

Influence of lens aperture on viewfinder

In fact, the influence of the lens aperture on the viewfinder is obvious. When using a large aperture lens, the viewfinder will be brighter and easier to observe. Because except when the camera is shooting or testing the depth of field, the camera lens sends light into the camera with the currently used lens aperture value. Therefore, the viewfinder with large aperture value has a brighter field of view when shooting bright scenes, and can also get better framing effect when the lighting conditions are poor.