What is the name of the camera in the library?

This is the first time I went to the library to read a book this year. What is the name of the inquiry machine used in the library?

You should be talking about a capacitive touch inquiry machine. Of course, if used in a shopping mall, it would be a capacitive touch advertising machine. The application fields of Guangzhou Jiechu capacitive touch all-in-one machine are getting wider and wider, and it can realize self-service inquiry, self-service ordering, new product display and exhibition, intelligent guidance, etc.

1. Manual camera

PUSHAF is when the camera itself is pushed, pulled and panned in the manual focus state. When the PUSHAF button is pressed, the autofocus will be activated instantly. When the focus is on the subject, Single-shot autofocus terminated. The infrared generator and ultrasonic generator on the camera emits infrared light or ultrasonic waves to the subject. The receiver on the camera receives reflected infrared light or ultrasonic waves for focusing. Its optical principle is similar to the triangular ranging focusing method. There is also an energy method in the active type, which is used for the autofocusing of low-end popular cameras and is widely used in various heads-up methods. Viewfinder camera. It is difficult for active focusing to focus on inclined and smooth surfaces. It is difficult to focus on bright and distant subjects. This is because the emitted light is reflected in other directions or cannot reach the subject. Because the camera actively emits light or waves, it can focus in low-contrast and low-light conditions. It can automatically focus on thin-line subjects and moving objects. The disadvantage is that it focuses when the subject absorbs light or waves. It is difficult and will be reflected by the glass, so it is difficult to focus through the glass.

2. Self-service cameras

1. Can be used at the same time: but the premise is: if you take the tram or pay the fare once when you get on the bus (or when you get off), It can be used again after 30 seconds or after another guest;

2. Not available: If you are taking the subway or other section-based transportation, you cannot use it because it is at the entrance You can only swipe your card once. If you swipe again, the system will think that you have come out again and immediately deduct the fare for the smallest stop instead of recording another passenger.

Reminder: Hong Kong’s transportation system generally does not support the use of one card for two (people).

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Octopus is Hong Kong’s universal electronic toll collection system. The chip is built into a credit card-sized plastic card. After recharging the card, place it on the receiver to complete the payment process. Octopus can be recharged at recharge machines, store checkouts, credit cards, automatic transfers from bank accounts, etc.

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

How to recharge

1 After cardholders of BOC Great Wall International Card fill out the application, their credit card account can be linked to their Octopus account.

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

3 Recharge once a day, with a maximum recharge of HKD 250.

4 The principal credit card can apply for self-service recharge service for the Octopus of yourself and 3 relatives.

Applicable locations

Octopus is applicable to almost all public transportation 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 libraries in most Hong Kong tertiary institutions. Even travel insurance for trips to mainland China can be purchased using Octopus at some stations of the Kowloon-Guangzhou East Rail Link.

3. Fully automatic camera

What to use for this depends on the person.

Through personal practice, I believe that if you are a novice, you should use a camera, because the camera itself is a professional photography tool and is easy to operate. I personally think that SLR is not suitable for novices. Because if you don’t know how to adjust the camera, it can be fully automatic, which is not easy to do with a SLR. If you are a camera expert, what you pursue is clarity, and among low-priced machines, it is natural to choose a SLR. If it is a stand-alone camera, it is convenient to use the camera, it is easy to zoom in and out, and it is easier to move stably and capture rich dynamics. A SLR is just a camera, and it is not easy to use electric balanced zoom. If it is held in hand, it is not easy to stabilize. Only a fixed camera position can give full play to its advantages. If it is a multi-camera situation, the camera should not move too much and can be fixed on a tripod or arm. SLR can give full play to its advantages. Because the sensor is large, the imaging effect and depth of field effect are very good, and it is cost-effective, so it is a natural choice. Use a SLR. Generally speaking, what is the best thing to use? Don’t look at what others use, just look at what suits you. Only a machine that is easy to use can produce beautiful video effects and perfectly express the theme that should be expressed. Some people can take good photos with a SLR, but some people just have difficulty using it, and the results are not good. You will understand this truth if you practice it more.

4. Manual camera

The FOCUS in the camera means focusing. Usually digital cameras have multiple focus methods, namely autofocus, manual focus and multi-focus.

1. Autofocus. The camera emits an infrared ray (or other ray), determines the distance to the subject based on the reflection of the subject, and then adjusts the lens combination based on the measured results to achieve autofocus.

2. Manual focus, which is a focusing method that manually turns the focus ring to adjust the camera lens so that the photos taken are clear. This method relies heavily on the human eye to focus on the focusing screen. The judgment of the image and the proficiency of the photographer 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-point focus or multi-focus. In addition to setting the position of the focus point, you can also set the focus range, so that users can take pictures with different effects. Common multi-point focusing is 5-point, 7-point and 9-point focusing.

5. Manual digital camera

For digital fully automatic cameras, if you want to use manual gear, just set the dial to m position

6. Manual Panning camera

Ren Qingtai, the founder of Beijing Fengtai Photo Studio, spent a lot of money to purchase a French-made wooden case hand-cranking camera and 14 rolls of film out of curiosity and the desire to be the first. In 1905, photographer Liu Zhonglun filmed several scenes in "Dingjun Mountain" such as "Inviting the Ying", "Dancing with the Knife" and "Confrontation" in an open-air venue for actor king Tan Xinpei.

Although it was only a silent black-and-white film, it was my country's earliest film and undisputedly ranked first in China in this industry.

7. Handheld camera

Kinon is a film camera.

Film camera, as the name suggests, is a camera that requires the use of film. It was quite popular in the previous film era, but fewer people use it now. How to use a film camera:

1. Use metering and exposure compensation

High-quality photos must not only have clear focus, but also have accurate exposure, so you need to use metering properly when shooting. model. The three most common metering modes are: average metering, center-weighted metering, and spot metering. When shooting objects with special brightness, the photographer needs to be flexible, that is, "exposure compensation". Generally, when shooting light-toned objects, "positive compensation" for exposure is required; when shooting dark-toned objects, "negative compensation" for exposure is required. When shooting a picture with a large contrast between light and dark, through "exposure compensation", you can shoot a brightness that matches the actual tone.

2. Select aperture and shutter time

Selecting aperture and shutter time has two meanings: one is technical, mainly to meet the exposure needs. Because the negative of a film camera is exposed to form a latent image, which is then developed and fixed to become an image. Film exposure is accomplished through a 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.

3. Ensure the stability of the film camera

When shooting, you must *keep the film camera stable and press the shutter halfway before starting the shutter. Generally speaking, when shooting with a handheld camera, you cannot use a shutter time lower than 1/125s. And the longer the chosen shutter time, the harder it will be to keep the camera steady. When using a standard lens or a longer focal length lens, such as an exposure time of 1/30s or longer, use a tripod to stabilize the camera, and then use a shutter release or "Selfie" to complete the shot. If you are shooting still life, no matter what shutter time you use, you should use a tripod to stabilize the camera.

8. Pure manual camera

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

Set the turntable on the body to "M" and slide the potentiometer on the lens to "MF", so it's all manual!

9. Manual mechanical camera

Remove the lens and gently reset the reflector by hand. This is how I solved the problem. Be careful not to use a hard board if it doesn't work. Find a professional to avoid causing more damage...

10. Handheld camera

The handheld camera equipment is called Gopro. This is an emerging professional action camera that can be shot using a handheld platform. Its main application range is various extreme sports and daily activities. In addition to handheld video recording, the base can also be mounted on the body as a stand. You can shoot while exercising. Popular among sports enthusiasts.

11. Self-service photography equipment

There is a self-service camera in the Majiapu Subway Station of Beijing Metro Line 4, as well as in Beijing South Railway Station, Dawang Road and Jiangtai Road. , Line 14, Line 4, and Line 16 Xiyuan, Malianwa, and Yongfeng stations are equipped with automatic cameras to provide passengers with the service of taking self-service ID photos. Passengers can pay with banknotes.

The self-service ID photo machine provides photos of ID cards, admission tickets, student ID cards and other documents, and can also provide personalized photography services. Passing by the self-service equipment at the subway station, the freshly-taken ID photo without makeup is as fun as taking a photo.

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

< p>The book search machine allows everyone to easily find the location of the book they want to read.