Summary of camera terminology

SLR camera is the abbreviation of single-lens reflex camera, which refers to the camera structure in which the photographer can directly see the image through the lens from the viewfinder. There is a reflector between the sensor and the lens of the SLR camera, which reflects the light into the optical viewfinder. When the shutter is pressed, the reflector pops up, allowing the light from the lens to reach the sensor. The mirror moves very fast, and even with a high shutter speed of 1/4000 second or 1/8000 second, the viewfinder will only be blocked for an instant.

The photosensitive element is the core part of photography and imaging, and it is also the most critical technology. The larger the area of ??the photosensitive element, the larger the image. Under the same conditions, more image details can be recorded, so the interference between each pixel is smaller and the imaging quality is better.

Simply put, the focal length is the field of view of the camera or lens. The smaller the focal length value, the wider the viewing range that can be seen. The larger the focal length value, the farther you can see like a telescope.

Lenses with a 35mm equivalent focal length between wide-angle and telephoto are called standard lenses. The angle of view of this type of lens is close to that of the human eye, so photos taken with a standard lens have the most natural angle of view.

When the focal length is smaller than the header, the lens can record images from a larger angle of view, so it is called a wide-angle lens.

A lens that is more than 2 times larger than the focal length of the mast head is called a telephoto lens

A macro lens is a special lens used for macro photography, mainly used to shoot very small objects. , such as flowers, insects, etc.

It is a unit that represents the amount of light transmitted by the lens per unit time.

The aperture is a device used to control the amount of light that passes through the lens and enters the photosensitive surface of the camera body, which is usually inside the lens. We use f-number to express aperture size.

F=Focal length of the lens/Effective aperture diameter of the lens.

The complete aperture value series is as follows:

f1.0, f1.4, f2.0, f2.8, f4.0, f5.6, f8.0, f11 , f16, f22, f32, f44, f64. It is worth mentioning here that the smaller the aperture f value, the larger the clear aperture

The larger the sensor size, the larger the photosensitive area, and the better the imaging effect.

Mainly refers to the rough part of the image generated when the CCD (CMOS) receives and outputs light as a receiving signal. It also refers to the foreign pixels that should not appear in the image, usually caused by electronic interference. . It looks like the image is smudged and full of tiny rough spots.

This is what we often call the background blur SLR effect. We can often see that in some pictures only the subject is clear, and the rest are blurred. This is because the depth of field is small. A small depth of field is often used to highlight the subject, and a large aperture is often used to create a small depth of field effect. As shown in the picture, a large aperture creates a small depth of field, making only the nearest flower clear and the flowers behind becoming blurred, highlighting the subject.

The abbreviation is WB. The human eye can automatically adjust to see white light in natural environments, but the camera cannot do this. Therefore, before pressing the shutter button, you must set the camera's "color temperature" to allow the camera to balance the color temperature and allow the camera to see the original color. It is white light, and the function of this setting is called "white balance setting", so that natural colors can be photographed.

The abbreviation is ISO. In the era of digital cameras, sensitivity refers to how sensitive the image sensor is to light. The higher the number, the higher the sensitivity and the more sensitive the image sensor is to light. It should be noted that according to the imaging principle of digital cameras, the higher the sensitivity, the more noise the photo will have and the worse the image quality will be.

The abbreviation is EV, usually the range is -2~+2. Exposure compensation is a method of exposure control. It is a shooting technique that consciously changes the "appropriate" exposure parameters automatically calculated by the camera to make the photo brighter or darker. Photographers can adjust the brightness and darkness of photos according to their own ideas to create unique visual effects.

The abbreviation is S. The moment we press the shutter, the door (shutter) blocking the lens and the photosensitive element will open to let in light. When the amount of light comes in is about the same, the shutter will close quickly, otherwise there will be too much light and cause Overexposure, the time between opening and closing the shutter is called shutter speed, also known as exposure time.

Most digital cameras have shutter speeds ranging from a few seconds to one thousandth of a second. There are also more advanced machines that can reach 2,400 or even 8,000 parts to one second. High-speed shutters can help photography Capture moving objects.

When the shutter speed is slow enough, you can take some very special photos at night, such as traffic and star trails on city streets.

It is used for taking pictures at night. The screen will increase the brightness when taking pictures, but the screen response will be slow and the effect will not be ideal when taking pictures.

Optical Zoom is a physical zoom. It uses a retractable lens barrel to adjust the position of the lens to achieve zoom. The larger the optical zoom, the farther the scenery can be photographed without affecting the photo taking. Effect.

English: Auto Foucs, abbreviated as AF.

Contrast refers to the contrast between light and dark in a picture, which makes the picture look black and white.

Color saturation actually refers to the purity of the color. The higher the purity, the more vivid the performance. The lower the purity, the darker the performance.

The anti-shake function is divided into two types: optical anti-shake and electronic anti-shake. The anti-shake function mentioned now is mainly optical anti-shake.

The optical image stabilization function senses small displacements through the gyroscope built into the camera or lens, and then reversely moves the lens in the lens or the camera's image sensor based on the displacement to offset the impact of the displacement. Through this function, you can reduce the chance of blurred photos caused by hand shake.

Aspherical lenses are special lenses in lenses that can improve the refractive index of light at the edge of the lens, focus the light on one point as much as possible, and improve the sharpness of the lens' imaging.

Sometimes called "sharpness", it is an indicator that reflects the clarity of the image plane and the sharpness of the image edges. If you turn the sharpness up, details on the image plane will have higher contrast and look clearer.

The bit rate is the amount of data per unit time. The greater the bit rate, the higher the accuracy of the data and the clearer the picture.

Time-lapse photography is a shooting technology that compresses time. What it shoots is a set of photos or videos. Later, through photo series or video frame extraction, the process of minutes, hours or even days and years is compressed into a shorter period of time and played in the form of a video.