What are soft focus, fixed focus, aperture, zoom, focal length and shutter?

Soft-focus photography is a technology to control and change the image definition, which can make a clear image produce halo phenomenon, thus increasing the softness and ambiguity of the image, adjusting the tone and reducing the contrast. When used in landscape and portrait photography, it can achieve unique artistic effects. There are many methods of soft-focus photography, and the results obtained by using different soft-focus methods are not the same. Often used to create a romantic atmosphere.

What is fixed focus?

The simplest explanation: the focal length is fixed, and you can't zoom in or out of the scene.

The advantages of fixed focus compared with zoom are better imaging quality and easier aperture enlargement.

The disadvantage is naturally that you can't zoom, and you can only rely on the photographer's actions to compose the picture. For example, the commonly used 50mm lens is a fixed focus lens.

Focal length refers to the position where parallel light illuminates the lens and focuses on the image. For the lens with Dan Toujing structure, it is a fixed focus lens.

The zoom lens is composed of lens groups, and zooming can be realized by changing the relative positions between the lenses. General zoom lens is 35mm-2 10mm. If the focal length of the lens can reach below 24mm, it is considered as a super wide-angle lens. If it can reach more than 300mm, it is regarded as an ultra-long lens. These are rarely used in ordinary photography.

What is an aperture?

Aperture is a device used to control the amount of light entering the photosensitive surface of the fuselage through the lens, usually in the lens. We use the f value to represent the aperture size. For the manufactured lens, we can't change the diameter of the lens at will, but we can control the luminous flux of the lens by adding a polygon or circular aperture grating with variable area inside the lens. This device is called an aperture.

What is scaling?

Zoom is another focus of the lens, focusing on zoom ability. The so-called zoom capability includes optical zoom and digital zoom. Although both of them are helpful to enlarge distant objects in telephoto shooting, only optical zoom can support adding more pixels after the main body of the image is imaged, making the main body not only larger but also relatively clearer. Usually, the larger the zoom factor, the more suitable for telephoto shooting. Optical zoom, like traditional camera design, depends on the focal length of the lens, so the resolution and image quality will not change. Digital zoom can only reduce the size of the original image and make the image larger on the LCD screen, but it does not help to clarify the details.

What is the focus part?

The focal length is the focal length range of the zoom lens.

What is a shutter?

A shutter is a device that blocks light from entering a lens. Generally speaking, the larger the shutter time range, the better. Low seconds is suitable for shooting moving objects, so a camera emphasizes that the shutter can reach116000 seconds at the earliest, which can easily capture fast moving targets. However, when shooting traffic at night, the shutter time will be lengthened, and the silky water flow effect in ordinary photos can only be photographed with a slow shutter.