What's the name of the camera in the library again

I went to the library to read for the first time this year. What's the name of the inquiry machine used in the library?

You should be talking about capacitive touch inquiry machine. Of course, if it is used in shopping malls, it is a capacitive touch advertising machine. Guangzhou touch-sensitive capacitive touch-integrated machine has more and more extensive application fields, which can realize self-service inquiry, self-service ordering, new product display, intelligent guidance and so on.

1. Manual camera

PUSHAF means that after the camera itself is pushed and pulled in the manual focusing state, pressing the PUSHAF button will instantly start the autofocus, and when the focus is on the subject, the single autofocus will be terminated. The infrared generator and ultrasonic generator on the camera emit infrared light or ultrasonic waves to the subject. The receiver on the camera receives the reflected infrared light or ultrasonic wave for focusing, and its optical principle is similar to triangulation focusing method. There is also an energy method in the active mode, which is used for autofocus of low-end and mass cameras and is widely used in various head-up cameras. Active focusing is difficult to focus on the inclined plane and glossy surface. It is difficult to focus on high-brightness and long-distance subjects. This is because the emitted light is reflected in other directions. Still can't reach the goal. An active camera can focus in low contrast and weak light because it actively emits light or waves. For the thin line body, it can automatically focus on moving objects. The disadvantage is that it is difficult for the target to focus when it absorbs light or waves, and it will be reflected by the glass, so it is difficult to focus through the glass.

2. Self-service camera

1, which can be used at the same time: provided that the fare paid when taking the tram or getting on (or getting off) at one time can be used again after 30 seconds or after passengers are separated;

2. Can't use it: If you take the subway or other means of transportation with segmented charges, you can't use it, because you can only swipe your card once at the entrance, and then the system will think that you have gone out again, and immediately deduct the cost of the smallest stop instead of recording another passenger.

Reminder: Hong Kong's transportation system generally does not support two people with one card.

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Octopus is a universal electronic toll collection system in Hong Kong. The chip is embedded in a plastic card the size of a credit card, which can be charged and placed on the receiver to complete the payment process. Octopus can be recharged at recharge machines, store payment offices, credit cards, bank account automatic transfer, etc.

Octopus is a contactless smart card, which is very convenient to use in electronic money. Whether it is trading or recharging, the operation is very simple.

How to recharge

1 After the BOC Great Wall International Cardholder fills in the application, his credit card account can be associated with the Octopus account.

Once the Octopus account balance is zero or negative, the credit card will automatically recharge the Octopus.

3 recharge once a day, with a maximum recharge of HK$ 250 yuan each time.

The credit card master card can apply for Octopus self-service recharge service for himself and his three relatives.

Applicable place

Octopus is suitable for almost all public transport and large chain stores in Hong Kong, such as convenience stores, fast food restaurants and supermarkets. Many new vending machines in Hong Kong also accept Octopus payment, including pay phone booths and self-service cameras. In addition, some self-service photocopiers also support the use of Octopus charges, including the libraries of most tertiary institutions in Hong Kong. At some stations of the Kowloon-Canton Railway, you can even use Octopus to purchase Chinese mainland travel insurance.

3. Fully automatic camera

What this is used for varies from person to person.

Through personal practice, I think if you are a novice, you should use a camera, because the camera itself is a professional camera tool, which is easy to operate. Personally, I think SLR is not suitable for beginners. Because if you don't know how to adjust the camera, it can be fully automatic, and SLR is not easy to do. If you are a master photographer, you are looking for clarity. In low-cost machines, it is naturally a SLR. If it is a single machine, it is convenient to use the camera, zoom shooting is easy, it is easier to move stably and shoot rich movements. SLR is a camera, and electric balance is not easy to zoom. If it is not easy to hold it steady, only a fixed position can give play to its advantages. If there are multiple cameras, the cameras should not be moved too much, and they can be fixed on a tripod or arm. SLR can play an advantage, because the sensor is large, the imaging effect and depth of field are good, and the cost performance is strong, so it is natural to choose SLR. Generally speaking, what to use is good, not what others use, but what suits you. Only good machines can make beautiful video effects and perfectly express the theme that should be expressed. Some people can shoot good works with SLR, while others just don't use it well, but the effect is not good. This truth will be understood after more practice.

4. Handmade cameras

Focusing in a camera means focusing, focusing. Generally, digital cameras have various focusing modes, namely, auto focus, manual focus and multiple focus modes.

1, autofocus, the camera emits an infrared ray (or other light), determines the distance of the subject according to the reflection of the subject, and then adjusts the lens combination according to the measurement result to realize autofocus.

2. Manual focusing is the way to adjust the camera lens by manually rotating the focusing ring to make the photographed photos clear, which largely depends on the judgment of the human eye on the image on the focusing screen, the photographer's proficiency and even the photographer's vision.

3, multi-focus, when the focus center is not set in the center of the picture, you can use multi-focus or multi-focus. In addition to setting the focus position, you can also set the focus range, allowing users to take photos with different effects. Common multi-point focusing includes 5: 00, 7: 00 and 9: 00.

5. Manual digital camera

Digital automatic camera, if you want to use manual gear, just set the dial to M gear.

Step 6 hold a camera

Ren Qingtai, the founder of Beijing Fengtai Photo Studio, bought a French-made wooden-shell hand-cranked camera and 14 roll of film out of curiosity and daring to be the first. 1905 Photographer Liu filmed many scenes such as invitation, knife dance and confrontation for the king of music in Dingjun Mountain.

Although only a silent black-and-white film was filmed at that time, it was the earliest film in China, and it was indisputably the first in China in this industry.

7. Handheld camera

Kinon is a movie camera.

Film cameras, as the name implies, need to use negative cameras. It used to be popular in the movie era, but now it is used by fewer people. How to use a film camera:

First, use metering and exposure compensation.

High-quality photos need not only clear focus, but also accurate exposure, so the metering mode should be used reasonably when shooting. Three common metering modes are: average metering, center focusing metering and spot metering. When shooting objects with special brightness, photographers need to be flexible, that is, "exposure compensation". Generally, when shooting light-colored objects, they need exposure "positive compensation". Exposure "negative compensation" is needed when shooting dark objects. When shooting a picture with a large contrast between light and dark, you can shoot the brightness in line with the actual tone through "exposure compensation".

Secondly, choose the aperture and shutter time.

Choosing aperture and shutter time has two meanings: one is technical, mainly to meet the exposure requirements. Because the negative of a film camera is exposed to form a latent image, and then developed and fixed into an image. The exposure of negative film is completed by the combination of aperture and shutter, and both aperture and shutter time can be adjusted differently. Another function of aperture and shutter time is to produce specific imaging effects on the screen.

Third, ensure the stability of the film camera.

Keep the film camera stable when shooting, and press the shutter before starting the shutter. Generally speaking, when shooting with a hand-held camera, the shutter time less than1125s cannot be used. And the longer the shutter time is chosen, the more difficult it is for the camera to remain stable. When using a standard lens or a lens with a longer focal length, if the exposure time is 1/30s or longer, use a tripod to stabilize the camera, and then use cable release or "selfie" to complete shooting. If you are shooting a still life, you should use a tripod to stabilize the camera regardless of the shutter time.

8. Pure manual camera

The manual mode of the camera system is divided into two parts: the body manual mode and the lens manual mode.

The dial on the fuselage is set to "M" and the potentiometer sliding gear on the lens is set to "MF", so it is all manual!

9. Manual mechanical camera

Just take off the lens and gently reset the mirror by hand. That's how I solved the problem. Be careful not to be hard. If it is really bad, you have to find a professional to avoid causing more harm. ...

10. Handheld camera

The device holding the camera is called Gopro. This is a new professional sports camera, which can shoot on a handheld platform. Its main application scope is all kinds of extreme sports and daily activities. In addition to hand-held video recording, the base can also be installed on the fuselage as a bracket. You can shoot while walking. Deeply loved by sports enthusiasts.

1 1. Self-service camera equipment

Majiapu subway station of Beijing Metro Line 4 has self-service cameras, and Beijing South Railway Station, Dawang Road, Jiang Tai, Line 4 14, Xiyuan, Malianwa and Yongfeng also have automatic cameras to provide self-service photo service for passengers, and passengers can pay with paper money.

Self-help photography provides ID card, admission ticket, student ID card and other photo certificates, and can also provide personalized photography services. The self-service equipment passing by the subway station and the freshly baked ID photos are as fun as taking big photos.

What is the name of the machine in the library where everyone can borrow books?

The book inquiry machine can make it easy for everyone to find the location of the book they want to read.