DVD cameras use skills to share

Lead: DVD camera use skills sharing. Some cameras have the function of frame accumulation (also called sensitization). By reducing the scanning speed, CCD can accumulate more electrons when capturing each frame of image, thus showing a bright picture in a low illumination environment. When this function is turned on, the minimum illuminance measurement value can be increased geometrically.

When sharing power with tips, DVD camera can save power by the following methods;

1. When shooting outdoors, you can try to turn off the backlight of the LCD, which will greatly improve the battery life.

2. shoot with a viewfinder. Although this is not as convenient as LCD framing, it can save a lot of electricity.

3. If you don't need to shoot, turn off the DV power directly. Because the disc burned in the DVD camera will also rotate at high speed during standby, it consumes a lot of power. Turning off the DV power supply can not only save electricity, but also let the DV dissipate heat.

What should I pay attention to when using DVD camera?

1. Do not expose the DVD camera to high temperature (higher than 60 degrees or 150 degrees). For example, a car exposed to the sun or directly exposed to the sun.

Don't let the DVD camera get wet. Make sure that the DVD camera is away from rain, sea water and any other humid environment. The failure or functional failure of DVD camera caused by moisture or water is sometimes irreparable.

3. The sudden increase in temperature may lead to the condensation of DVD camera.

-Move the DVD camera from a cold place to a warm place (for example, from outdoor to indoor in winter);

-Move the DVD camera from a cool place to a hot place (for example, from indoors to outdoors in summer);

Basic operation methods and skills of camera 1. Looking at technical progress from camera replacement.

Cameras can generally be divided into three levels, home level, professional level and broadcast level. The earliest video camera in our bureau was a home VHS camcorder, which should be 1984. Twenty-five years ago, the ordinary 1/2 video tape was used. At that time, there was only one such camera in the TV station, and the picture quality was also poor among the cameras. Later, Sony M3 and Toshiba C 1 cameras were used, and the video tape of 1/2 was used. These two machines have obviously improved their image quality and belong to broadcast cameras. But the camera and video recorder are separate, connected by cable, and the camera is carried on the shoulder. The backpack of the video recorder needs to be carried on the shoulder, or carried by an assistant, so it is inconvenient to move with the photographer [www.t262.com]. With the development of camera technology, our TV station has bought real broadcast-level camcorders, which are now commonly known as cameras, cameras and video recorders. At that time, we bought two KY- 19 and KY- 17 from JVC Shengli Company, using SVHS video tapes. Compared with the old-fashioned backpack camera in the past, our reporter's feeling can be described as gun for gun, which is convenient and quick to shoot without wearing an annoying tail. However, compared with Sony and Toshiba, the image quality did not improve significantly, which was related to the defects of SVHS system of JVC camera at that time. Then BATCAM cameras began to enter our TV station. At that time, the earliest BATCAM cameras in our county were all purchased by audio-visual education center. Later, we bought three different models of BATCAM cameras from Sony, and used BATCAM video tapes to record signals. Although both of them belong to video tapes, the image quality of BATCAM system is far better than that of previous models. However, with the rapid development of digital technology, digital cameras began to gradually replace the old BATCAM cameras, and also brought a series of changes in editing and broadcasting, especially our production and broadcasting. From linear video editing to nonlinear video editing, the call of video material can be realized instantly, which saves a lot of external equipment, and the image quality will not be attenuated or lost during image transmission and adoption. The P2 card camera deployed last year has gone further to the direction of pure digital recording, and both the speed of video acquisition and the restoration of image quality have been guaranteed to the greatest extent. In just 20 years, the cameras in the hands of our photographers have been constantly updated with the continuous progress of science and technology, which also requires us to understand and skillfully use the machines in our hands through serious and in-depth study in order to take high-quality photos.

Second, the camera cleaning and maintenance

For us photographers, the camera is the gun in the hands of soldiers. We should love the machines in our hands as much as our own eyes. Every cameraman, when he becomes a cameraman, the first thing is to learn how to clean and maintain the camera.

Let's talk about cleanliness first. When I started as a photographer in 1993, the first lesson I learned was not to use machines. The teacher didn't tell me how to use the camera, but took me to clean it with a brush, suede, balloon blowing and towel. Except for the lens, the camera is dusted with a hard brush, and every gap is spared, and then the whole camera is wiped with a semi-dry towel. The camera lens is the most delicate part of the whole camera, and we can't clean it with a hard brush. First of all, clean the lens cover around the lens, and be sure to clean the dust with a soft brush. The soft brush is used because the cleaning part is too close to the lens to prevent the lens from being damaged. When cleaning the lens, look at the surface of the lens in the light. If there is only fine dust, it can generally be cleaned by blowing balloons. If there is water vapor or stains, wipe the lens surface with suede or lens paper in one direction, and blow away the dust or fibers that may remain with a balloon. We clean the viewfinder in the same way. Goggles on the viewfinder should be removed separately, cleaned with a stiff brush and wiped clean with a semi-dry towel.

Camera maintenance is a good habit that every cameraman must develop. When you come back from the interview, be sure to take out the video and close the video door. Even if you don't need to collect images at that time, take out the video tape and let the mechanical device inside the camera rest. Then turn off the power and take off the battery to charge. When the battery of our camera is not used up, we should discharge it first and then charge it as usual. Take out the battery and turn off the charger as soon as possible after charging, which can prolong the service life of the battery and charger. I don't know how many journalists can handle our camera batteries and chargers according to this procedure now. The charger in the equipment library is often an ever-burning lamp, and the battery is often hung on the charger for a long time before being taken out next time. I hope everyone will take good care of our camera battery at work, charge and discharge it as required, and try to prolong the service life of the battery (nickel-cadmium battery has memory function, and charging after discharge can prolong the service life, but lithium battery does not have such a problem). In the process of charging and discharging the battery, our reporter should reset the switches commonly used in the camera, such as automatic white balance switch, recording channel selection switch, automatic shooting switch, etc., because many times, we will receive the interview task at any time and leave in a hurry. The advantage of the reset switch is that after the battery and video tape are installed, they can be picked up for shooting. Usually, if you are well prepared, you will make fewer or no mistakes when you go out to interview, and ensure the shooting quality.

Learning the correct method of camera cleaning and maintenance is a compulsory course for every cameraman, and it is also a good habit that every cameraman should develop.

Third, the use of common switches for cameras

There are many switches on our cameras, especially larger machines, such as Sony 600 series, which we often use.

P2 of Panasonic 500MC at most. Although the machine models are different, the commonly used switches are basically the same. First of all. Color filter changeover switch, its main function is to select different filters according to different light, and at the same time control the intensity of light entering the camera. In the past, camera color filter switches were generally 1 gear 3200K, gear 2 5600 and gear 3 5600+ND. And the Sony 600 we are using now. After selecting 5600 or 3200, the 1 file is a color filter in non-weak light state, and it can be used by selecting the correct white balance in normal light. The other three ND filters are used in outdoor strong light, which is not needed for indoor shooting. The data indicated on the nd film are 1/8, 65438+ 1/06, 1/64, but this data tells us that when you use this filter, the light intensity after the ND film will be reduced to 1/8, 65438+/kl. At the same time, judge whether the ND filter is used correctly, the phase detector screen should not be too bright or too dark, and the automatic aperture is 7-650. The second is the gain switch, which can forcibly improve the brightness level of the camera when shooting in poor light, and there will be granular impurities on the image surface. The greater the increased gain, the rougher the image surface. Generally used in the case of extremely weak light at night, the color filter must be placed at 1 and the white balance should be placed at 3200; Third, the video/color bar output switch is very simple, generally placed in the GAM position. When the newly used video tape needs to record color bars, or when shooting needs interval prompts, you can turn the switch to the bass position to output color bars. Four, black and white balance switch, black balance generally does not need to be adjusted, only when the camera is used for the first time, or when the camera is placed for a long time, or when the season and temperature change greatly. Everyone is familiar with the white balance switch. Generally, it is only used when shooting a fixed subject. Because the light is basically unchanged, the best color reproduction can be obtained by adjusting the white balance, or the white balance can be uniformly calibrated in multiple cameras to make the video colors output by each camera basically the same. When going out for an interview, with the change of the subject and the movement of the plane, everyone uses automatic white balance. The disadvantage of automatic white balance is that there will be deviation when automatically tracking and adjusting the white balance, which will lead to inconsistent colors, but it will basically not affect the shooting effect. V. The automatic white balance storage selector switch will generally set two different color temperatures, A and B, such as 5600 and 4000. The lowest gear is generally the standard color temperature of 3200K set by the manufacturer. The lowest gear of Panasonic 500 is slightly different, and it can be quickly switched between 3200 and 5600. 6. The volume automatic manual switch and the channel selection switch in the video recorder are generally arranged up and down. In general, the automatic manual switch of sound level is set to manual, and automatic shifting will lead to an increase in background clutter. The channel selection switch, as an experienced old reporter, will always set the 1 channel at the microphone position on the car, and the 2 channels will always be set at the microphone position outside the car. When an external microphone is needed, you can directly plug in two channels, so that in any case, you can collect live sound while shooting the picture, and even if the interview microphone fails, you can ensure the normal collection of live sound.

Under normal circumstances, switches that are not commonly used, such as shutters, are turned off. Generally, electronic shutters are usually set in 60HZ mode, and no adjustment is needed after setting. The aperture above the camera lens handle is placed in the automatic position; The ZOOM ring switch zoom under the grip is placed in the servo control position, and the zoom ring switch is only placed in the manual operation position during long-distance transportation; The last side of the camera lens is a close-up focus ring (macro), which can be used when shooting more subtle objects. Press the switch with the subscript m by hand to focus. Outside the close-up focus ring is a flange focus ring, which is mainly used to adjust the back focus, that is, the distance from the lens installation surface to the imaging surface. In addition, there is a knob to adjust the monitoring volume. The knob to adjust the volume of the camera playback state is relatively simple, so I won't say much.

Fourth, common shooting techniques

There are many ways to shoot a camera, including pushing, pulling, shaking and moving. According to the angle formed by the camera relative to the subject, it can be divided into prone shooting, supine shooting and upward shooting. According to the focal length of the lens, we can divide it into long focal length lens, standard lens, wide-angle lens and macro lens.

By push and pull, we mean changing the proportion of objects in the picture through the zoom ring of the lens. Let's talk about pushing the lens first. Pushing the lens can make all or part of the relatively distant subject in the picture get closer and closer to us, giving people the feeling that we can clearly observe the subject or even the local details of the subject. Usually this technique will play a prominent role in the subject. In a painting, use this technique to focus the audience's attention on the people, scenery or details you want to show and highlight. Pulling can be said to be the process of bringing the current scene into the painting to the maximum extent, so that the subject taken at the beginning gradually moves away from the picture, and the surrounding and background environment of the subject are more and more displayed. This technique is generally used to let the audience know the position of the subject, the relationship between the subject and the surrounding people's scenery, and even explain the process and background of news events, giving people the impression that the picture is from point to surface to see the big picture; But panning usually means that the photographer's position remains unchanged, and the camera lens shakes left and right or up and down. Especially when the wide-angle lens can't record the current scene, panning can make the audience see the whole scene clearly. When shooting wider scenes, such as large venues, pastoral mountains, rivers and lakes, larger subjects are used more, giving people the impression that they can see the scenery or environment of news events from beginning to end. Finally, the movement in push-pull panning, as the name implies, refers to the movement of the lens. The movement of this lens is not obtained through the zoom ring or panning, but through the movement of the photographer's position. The audience can see the different subjects and their backgrounds that change with each action (shooting in the audience of the venue), or the changes of the subject's position and motion state and the changes of the surrounding environment (people follow the camera).

Note: three points: the first point, stability. The word "stability" has two meanings. First, the camera should be held steady and the shaking of the lens should be minimized. The camera should be carried on the shoulder like a rock, the palm of your hand should firmly hold the grip of the camera, and your breathing should be stable. /kloc-You'd better hold your breath when shooting the lens within 0/0 second. The second layer means that the camera should be stable, don't shrug, don't evert the palm of your hand, ensure the stability of the picture, and always pay attention to the contrast between the periphery of the phase viewfinder picture and the subject. Second, composition. The simplest definition of composition is the position and proportion of the subject in the picture. Simply put, when shooting a single person, the head of the subject should not be pushed to the upper edge of the picture, and the left and right remaining space of the front subject is similar. When shooting from the side, the distance between the face and the frame of the picture should be greater than the distance between the back and the frame of the picture, and the frame at the bottom of the picture should not be lower than the waist of the person. The composed picture looks natural and harmonious, and the proportion of subjects in the picture is moderate. Many times we feel uncomfortable when we see some pictures, and many times the composition is not rigorous and too casual. If you want to shoot a good composition, you should explore more in the usual shooting, be serious in the shooting process and pay attention to the composition of the picture. The third point is the angle. A good angle can give the audience a visual impact. A good angle requires a photographer to be sharp-minded and observe the scene carefully. A good angle has been found. It is not a good angle to stand in your most convenient place at will. Good angles are always reserved for prepared photographers.

Treatment of common faults of cameras The following are two common troubleshooting methods:

The first is virtual focus. The so-called virtual focus means that after your lens is zoomed in and focused, you open the lens and find that the objects in the picture are not clear. This situation is generally caused by the misalignment of the flange focusing ring on the camera lens. In this case, journalists should not panic. You can take any item and put it about 3 meters away from the lens. The aperture is set in the manual position, and the lens zooms in and focuses. Then, open the lens, adjust the flange focusing ring to make the picture clear, and then repeat the above step 3-. If you can't solve it, you can bring it back and let me handle it.

The second disadvantage is frosting. I think many photographers have encountered frosting of lenses and magnetic drums. The main reason is that the temperature and humidity of the environment photographed by the camera change too much, especially from low temperature environment to relatively high temperature environment. For example, taking the camera out of an air-conditioned car or a room with low temperature in summer and shooting in a warmer room or greenhouse with normal ambient temperature in winter will cause the lens to frost. Avoidance: If we go to a distant place in hot summer, in order to avoid the camera being in an air-conditioned environment for a long time, it is recommended to put the camera in the trunk of the car before departure, so that the temperature of the camera body will not be too different from the outdoor environment. If there is no trunk, after arriving at the interview site, put the camera into the shooting environment to make its temperature equal to the ambient temperature, and open the tape magazine to prevent the drum from frosting.

In winter, camera frosting is often encountered in greenhouses, because the temperature and humidity in greenhouses are high, and the frosting phenomenon is particularly serious and stubborn. It is suggested to prepare lens paper before the interview, wipe off the fog and water vapor on the lens in time, and at the same time, fast-forward and fast-shoot, shoot a few shots and then come out to dry the machine, and open the tape bin at the same time, which can alleviate the frosting phenomenon. The high temperature and humidity environment is harmful to the camera, so pay attention to protect the machine when shooting. Finally, when shooting outdoors in rainy days, you must do a good job of waterproof the camera. In the absence of raincoats or other rain-proof conditions, you should take off your coat and cover the camera without hesitation to prevent the camera from being directly wet by rain.