How much do you know about cameras? What are the typical pixels of cameras and camcorders?

At the beginning, it was a film camera, and the film was actually silver bromide, and when it was exposed to light, the silver bromide would show different brightness and darkness according to the intensity of the light, and it would be shaped after processing, and would not change with the external light. In the 30s of the 19th century, the first ** was born in a village in the United States, and it took 8 hours. Later, many people went out to have a commemoration, and at the beginning of the last century, there was a point-and-shoot camera (the distance between the lens and the focal length of one or two times is very small, and there is basically no need to focus, and the focus of the old-fashioned camera is very troublesome).

Later, new chemical paints appeared, which showed different colors when different colors of light were perceived, and at the end of the 19th century, the first color photographs appeared. In the seventies and eighties of the last century, digital began to become popular, the camera captured the color light entering the camera through the photosensitive plate on the back, and then converted it into a 10101 encoded form and stored it (each pixel is a few bytes), for better results, the lenses in the camera lens became more and more complex, more and more precise, and could autofocus according to demand. For example, my old 60d is said to be composed of 6 finely machined lenses, so it can achieve very good light effects.

Now, the camera has also been installed in the phone, and the Mate 20 has even reached 4800W pixels, so everyone can record their wonderful moments and share their beauty at any time.

Mobile phone photography is developing rapidly, and more and more people are using it. Large scenes are shot with drones, medium scenes are shot with SLRs, and mobile phones such as Huawei V|are carried with you when traveling0, P20 is easy to shoot, the effect is very good, and the software adjustment comes with the mobile phone in the later stage. Mobile phones are gradually shrinking the market share of SLRs, and in the past, carrying SLRs on their shoulders was a symbol of professionalism, but now it is outdated.

I know about the camera, the bigger the pixels, the sharper the shot.

There are three flash modes, which are: Rear Curtain Sync, Anti-Red Eye, and Supplemental Flash.

I don't know much about cameras, but there was a time when I wanted a camera, and then I thought it was better not to delay my studies.

The camera was created in a very early era, and it was made up of a large box at the beginning.

I think the camera is more beautiful than the ** taken by the mobile phone, and it can take more beautiful pictures of people.

I think the camera should not only be expensive, but also be able to take pictures by yourself, so that the best you can shoot is good-looking.

I don't know a lot, although a camera is much better than a mobile phone, but no one can carry a camera with them, most of them carry a mobile phone.

Take out your mobile phone, take a photo, post it on Moments, and get likes, this is the camera that most people know.

Camera: I only know that the more expensive camera is more complete and a little better.

I think the camera I know is that there are those high and low magnifications, which can be adjusted high and low, and the principle of convex lens formation.

A camera is called a camera because it takes pictures.

At present, (2015), the number of pixels of new digital cameras is generally more than 16 million, and the number of single-lens reflex cameras is basically more than 20 million pixels. Digital cameras, on the other hand, typically have between 500 and 12 million pixels (still) and 1 million to 4 million images for video (dynamic).

It should be noted that although the static ** of the digital camera can also reach the level of tens of millions of pixels, its imaging quality can not be compared with the same level of pixels of the digital camera, one of the reasons is that the size of the CCD sensor of the digital camera is small, and when the same input of high pixels**, the CCD area occupied by a single pixel is small, and the corresponding **noise is large. But because its main function is to take pictures, there is no need to be strict about the quality requirements of static **. Of course, some high-end cameras, using large CCD image sensors, can also shoot SLR level, but it is very expensive.

There are changes in this different time period, and at present, the number of cameras is more than 8 million, and 10 million and 15 million are more appropriate; The camera requirements are lower, more than 2 million is about the same.

The camera looks at pixels, and usually one megapixel is enough. The key to the camera depends on the number of sensors, three is better than one, and the sensor size is 3 4 inches of 2 3 inches, and then there is the higher the number of horizontal lines, the better, as for the pixels, only look at the dynamic pixels, static is useless.

Generally, the number of pixels of a Canon SLR is 16 million to 23 million.

The average digital camera has 3 million to 4.9 million pixels.

Note that machine image quality is definitely not determined by the number of pixels. Like some people say that the more pixels, the sharper it is, which is completely wrong.

Photography is the most basic and important imaging instrument in nuclear medicine. It is a nuclear medicine instrument that can image the distribution of radionuclides in the internal organs and be used for the observation of the initiation state. It is composed of scintillation detector, counting stool computer, display and other components; If a special device is attached, whole-body imaging can be performed. The advantages are:

The detection sensitivity is high, it can be imaged at one time, the imaging speed is fast, it can be quickly and continuously dynamic imaging and counting, and the morphology and function are combined for observation.

A camera is an optical device used for photography. After the light reflected by the subject is focused through the photographic lens (camera objective) and the shutter that controls the amount of **, the subject forms a latent image on the photosensitive material in the camera obscura, and then processes (i.e., developing, fixing) to form a permanent image, which is called photography.

The camera uses the linear propagation nature of light and the refraction and reflection of light, and uses photons as the carrier to transmit the light information of the photographed object at a certain moment to the photosensitive material through the photographic lens in the form of energy, and finally becomes a visible image.

The camera's optical imaging system is designed according to the principle of geometric optics, and through the lens, the image of the scene is accurately focused on the image plane through the straight propagation, refraction or reflection of light.