What does a digital camera mean?

Question 1: What does a digital camera mean? Digital camera, English full name: Digital Still Camera (DSC), short name: Digital Camera (DC), short name of digital camera, also known as digital camera. Digital camera is a kind of camera that uses electronic sensors to convert optical images into electronic data. According to the use, it is divided into: SLR camera, card camera, telephoto camera and household camera. Digital Camera (also called digital camera in English: DC for short) is a kind of camera that uses electronic sensors to convert optical images into electronic data. The principle of digital camera recording images on film through silver bromide's chemical changes is different from that of ordinary cameras. The sensor of digital camera is photo-induced charge coupled (CCD) or complementary metal oxide semiconductor (CMOS). Before an image is transmitted to a computer, it is usually stored in a digital storage device (usually using flash memory; Floppy disks and rewritable compact discs (CD-RW) are rarely used in digital camera equipment. Working principle: Digital camera is a product integrating optics, machinery and electronics. It integrates the conversion, storage and transmission of image information, and has the characteristics of digital access, interactive processing with computer and real-time shooting. Light enters the camera through a lens or lens group, and is converted into a digital signal through an imaging element, and the digital signal is stored in a storage device through an image operation chip. The imaging element of digital camera is CCD or CMOS, which is characterized in that when light passes through it, it can be converted into electrical signals according to different light. Digital cameras first appeared in America. More than 20 years ago, the United States used it to transmit photos to the ground via satellite. Later, digital photography was converted to civilian use, and its application scope continued to expand.

Question 2: What does a camera mean? Let me tell you more.

Well ~ ~ To be precise, ISO should be the standard of ISO representing the photosensitive speed in traditional film cameras. In digital cameras, ISO, like film, represents the photosensitive speed of CCD or CMOS photosensitive elements. The higher the ISO value, the stronger the photosensitivity of photosensitive materials. The calculation formula of ISO is S=0.8/H(S sensitivity, h is exposure). As can be seen from the formula, the higher the sensitivity, the lower the requirements for exposure. The exposure speed of ISO 200 film is twice that of ISO 100. That is to say, under the same conditions, the exposure time of ISO 200 film is half that of ISO 100 film. In digital cameras, the number of light sources and the value of picture brightness can be changed by adjusting the equivalent sensitivity. Therefore, the sensitivity has also become a value that indirectly controls the brightness of the picture.

In the traditional 135 film camera, the equivalent photosensitive value is a measure of the sensitivity of the camera film to light, which is usually expressed by ISO number. The larger the number, the stronger the optical rotation. Commonly used expressions are ISO 100, 400, 1000, etc. Generally speaking, the higher the sensitivity, the thicker the film particles and the worse the magnification effect.

The traditional camera itself has no sensitivity, because sensitivity is only a quantitative sign of the sensitivity of photosensitive materials to radiation energy under certain exposure, development and testing conditions. Anyone who has used a traditional camera knows that the most important index of film is sensitivity-in layman's terms, it is to measure how much light is needed to complete accurate exposure of film. We bought100,200,400 films in the camera shop, and the numbers represent the sensitivity. Sensitivity is generally expressed by ISO value. With the increase of this value, the sensitivity of the film to light increases, so that it can be shot in different light. Movies like ISO 100 are most suitable for outdoor shooting on sunny days, while ISO400 movies can be shot indoors or in places with poor light, such as early morning and dusk.

However, because the camera is different from ordinary cameras, its photosensitive device adopts CCD or CMOS, so there are corresponding requirements for exposure, and there are also problems of high and low photosensitive sensitivity. This is equivalent to a certain sensitivity of the film. In order to facilitate the understanding of digital camera users, digital camera manufacturers generally convert the sensitivity of digital camera CCD (or light sensitivity) into the sensitivity of traditional film, so digital cameras have the saying of "considerable sensitivity".

From the point of view of measuring film sensitivity, at present, the sensitivity of digital cameras is distributed in the middle and high speed range, the lowest is ISO50, the highest is ISO6400, and most of them are around ISO 100. For some digital cameras, the sensitivity is single, and the sensitivity tolerance of CCD is very small, which limits their use effect in the case of too strong or too weak light. Other digital cameras have a certain sensitivity range, but even within the allowable range, the shooting effect is different if the sensitivity is set high or low, so we should put the best sensitivity in normal shooting. Like traditional cameras, low ISO values are suitable for creating clear and soft pictures, while high ISO values can compensate for poor lighting environment.

When the light is insufficient, the use of flash is inevitable. However, in some cases, such as exhibition halls or performances, if it is not allowed or convenient to use flash, the brightness of photos can be increased by ISO value. Because of the adjustability of ISO value of digital camera, sometimes we can only reduce the use times of flash by increasing ISO value and increasing exposure compensation. Increasing the ISO value can increase the brightness, but it may also increase the noise of the photo.

Question 3: What does "digital" of a digital camera mean? Numbers mean digital coding. The traditional film is replaced by the image sensor, and the brightness and color of light are converted into a series of numbers consisting of 0 and 1 through each pixel, which are recorded on the memory card.

Question 4: micro-single digital camera, what does micro-single mean? The name was invented by Sony. Digital cameras can be divided into:

1. Cameras with interchangeable lenses can be divided into:

1. 1 optical viewfinder interchangeable lens camera (through single lens-mirror-frosted screen imaging-eyepiece optical path)-the so-called SLR camera.

1.2 electronic viewfinder interchangeable lens camera (through single lens-sensor-processor-electronic viewfinder screen)-commonly known as single battery.

2. Cameras with non-replaceable lenses-general consumer digital cameras belong to this category. According to the framing method, it can be divided into:

2. 1 paraxial camera: the camera takes pictures through the optical observation window of the fuselage, and the observation light path does not pass through the photographic lens.

2.2 Coaxial viewfinder: camera lens-sensor-processor -LCD/ back of fuselage and/or monocular electronic viewfinder.

Sony has introduced a model a55/77 interchangeable lens, which uses a half lens instead of a reflector and an electronic viewfinder, which is very similar to the shape of a SLR and belongs to a single battery (interchangeable lens, electronic viewfinder). Therefore, Sony calls its other small and thin nex battery a microbattery to distinguish it from a55/77.

Question 5: What does P mode mean in digital cameras? P mode is program mode.

There are also A/T modes, which are all modes with adjustable parameters. Of course, they can all be used.

Many other situational modes, automatic modes, are already set and do not need to be adjusted manually.

It's almost like a fool's machine, as long as you choose the right scene, it's OK.

If you want to practice your hands, of course you will take photos in the mode of point /A/T, but you also need some preliminary knowledge of photography accordingly.

Question 6: What does digital camera SLR mean? What are the advantages of a single lens reflex camera?

So it is called a camera with a lens and a viewfinder.

Of course, there are dual-lens reflex cameras, things from the old society,

There are also cameras that don't use mirrors to take pictures, such as paraxial cameras.

Digital SLR is a SLR camera that uses digital photosensitive elements instead of film.

The quality of SLR imaging is good because its sensor area is dozens of times that of a card machine, and the pixel value is actually a relatively unimportant thing.

The response speed is fast, from start-up speed, focusing speed to continuous shooting speed, which is simply beyond the reach of the card machine. Photography is an instantaneous art, and it is conceivable how important the reaction speed is.

Compared with the card machine, it has more manual operation space, and opens almost all the parameters and characteristics in the process of photography to you, so that you can give full play to your creativity. Of course, there are more operational large-format cameras.

The huge lens group makes your creative process more powerful than any other kind of camera.

Question 7: What does DPOF in digital camera mean? This is an agreement. There is a card printer that can print directly. You can debug the system, connect the digital camera to the photo printer, and print photos without a computer.

I suggest you look at Baidu hacker: baike.baidu/view/65011.

Question 8: What do the specifications and models of digital cameras mean? Specifications and types are understood separately.

Types of digital cameras: According to the most common uses of digital cameras, they can be simply divided into:

1 SLR camera: SLR refers to a single-lens reflex camera, that is, SLR. Another major feature of a single-lens reflex camera is that it can change lenses of different specifications, which can be understood as changing cameras with different lenses according to different needs.

Card camera: There is no clear concept of card digital camera in the industry. Only those small shapes, relatively thin bodies and ultra-thin and fashionable designs are the main standards to measure this kind of digital camera. It can be understood as a fool machine or a home machine. Very common.

3 telephoto camera: telephoto digital camera refers to a model with a large optical zoom factor. The larger the optical zoom factor, the farther the scene is photographed. It can be understood as a telescope in a camera. A camera that can shoot from a distance.

Specification of digital camera: generally refers to the volume, length, shape and weight of the product. It's just a matter of size. It can also be used to represent the relevant parameters of the camera. For example: pixel size, resolution size, zoom type, battery type, etc.

Question 9: Why do all digital cameras have a DSC? What does this mean? 1, the number of photos taken by digital cameras?

2. Different brands of cameras may use different codes, and DSC is used more.

3. Digital camera, short for digital camera, full English name: Digital camera (DSC).

Question 10: What do you mean by digital camera consumption? Consumer grade refers to card type, which is generally household fool type, that is, economical type, followed by portable, single battery and SLR.