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2010-10-28 02:52:46

About digital camera’s 10 knowledge

About digital camera’s 10 knowledge 1. Pictures are sometimes the wrong color, we often find digital photos of the scene inside our eyes to see the original color of the landscape has changed, sometimes reddish, sometimes yellowish. This is how the case? This does not adjust the white balance was mainly due to good reasons. Function of white balance adjustment and color photography in the traditional when you add the role of color temperature conversion filters are similar, the purpose is to achieve accurate color reproduction, but the color temperature does not need a digital camera plus lens filters, instead of using circuit adjustment mode , by changing the electronic circuits of red, green and blue color mixing ratio, the color of the light elements in the amendment off the high side. Most digital cameras have automatic white balance adjustment, this function under normal conditions or more accurate, but under some complex conditions, difficult to ensure the shooting. In fact, we are exposed to the light source is generally more complicated. So we have to take the time to develop the first observation of the surroundings, the camera white balance adjustment put before good practice. Some digital cameras have self-adjusting the white balance adjustment mode, generally a rectangle with a small box above, the following two small triangle symbol. This mode of white balance adjustment is to let you point the camera at the scene white objects, and then half-press the shutter, this time, the camera will automatically record the status of this white light, according to this value, you can then The shooting of color to the correct restore. I suggest that you adjust the camera white balance modes such conditions, use it, in most cases, it is more precise.canon bp-308 battery 2. Pictures are a virtual might be mainly caused by several factors. First, the digital camera shutter lag time is longer, so the hand is not easy to predict with confidence that this is taken out of the image will be virtual, because that is the hand shake. In general, the staff can jitter is negligible and the focal length of the shutter into a reciprocal relationship between the degree and faster than this time. Therefore, the light is not very good, slow, we would not be desirable to use Jiaojia moving or fixed objects to a fixed camera. Secondly, the picture is worthless and may have no choice because the focus of a good reason. Very often, we only noticed the scene to be shot inside the box on the viewfinder, while ignoring sharpen the focus on the subject to shoot, then the picture would be the case on the subject is not true. Again, that is, the location of the main movement occurred, due to slower digital camera shutter, resulting from the completion of pressing the shutter to take a relatively long time used, then it is easy to place the main location of the mobile, in this case pictures are also is vain. Solve the above problem, one is used and with stationary objects to a fixed camera, the other one is flat on the camera can make the camera move together with the shooting of objects, so that although the background of the picture is fuzzy, but the main is clear. Method often used for filming behind fast moving objects such as cars and so on. 3. Take a good picture, there are many small point in this case most of the night of the shooting. This is due to the high sensitivity caused. The photo is what we call noise. To know the sensitivity (ISO) the higher the value, the picture quality will be more rough, the lower the sensitivity value, the screen will be more delicate. However, the sensitivity means high sensitivity to light, so when shooting in low light, we often choose high sensitivity, then, if the camera’s own noise reduction system is not good, it will cause the noise appears on the screen situation. Want to avoid such a situation, we need to artificially adjust the slightly lower sensitivity, then a relatively long exposure time to compensate for the light to enter, so pictures are there will be level, and quality assurance the. Of course, the premise is that you need to bring a tripod. 4. Pictures are too dark or too bright it is often better because the exposure causes no control. First, we should know and what exposure are related to control and then correct it. It is mainly and the following factors: A. and the object itself between the ability of the reflected light. The reflection of light of different objects are different. Let’s imagine a black from the coal store in the snow cat to a glass of milk bottles, among them how the difference? B. Lighting. This and the relationship between the intensity of light, and light intensity, the natural need the exposure time is short; and vice versa. C. film speed. Low sensitivity to light sensitivity that relatively weak, require relatively long exposure time; sensitivity at the high sensitivity to light, requiring relatively short exposure time. But easy to bring high sensitivity is difficult to avoid the noise, appear on the screen is a lot of coarse particles. So how do we come all the objects exposed to the right as much as possible to the photosensitive material to restore go? This requires us to grasp the knowledge of the following: a. the aperture: As already repeatedly stressed, the greater the aperture, the greater the amount of light; the smaller the aperture, the smaller the amount of light. b. adjust the speed: the faster the shorter the time into the light, into the light is smaller; and vice versa c. metering method: In general, we want to subject to metering, the camera will be prompted to give your required aperture and speed. According to this figure to the exposure, the resulting picture should be a gray color photos. So, whether black or white photos are reduced to 18% of the ash, in photography, called “middle gray.” But we usually encounter is rarely black or white to take some objects, then this exposure is no problem. If you encounter a black or white objects, it is also easy to handle. Things like making snow, you can first half in front of your hand pressing the shutter, which is the metering of their skin, and then take on the kind of snow you press the shutter, Name the snow is white color. The reason is that the camera was metering your hand, because of our skin to close mid-level gray, so the ratio of skin to naturally restore the white of the snow will be gray become brighter than white. As another example, a person’s clothes are black, we can also use the same method, the first of their skin metering, and then shoot. Our hypothetical, if the make another snow when metering with the snow itself, then what is the color photo to get started it? You can try, is not necessarily snow, white reflective objects can be strong. Now the camera’s side light the way to have the central focus of the average metering, spot metering. canon bp-2l5 battery d. In addition, digital cameras generally offer + /- 2ev file, exposure compensation, exposure of a photo when you feel you can not add and subtract when the exposure compensation to be adjusted. Because the objects in a different environment, making light, so how to control the exposure is essential. Flash, reflectors and other natural very useful, appropriate use of the correct exposure compensation is another effective way. EV value, said exposure value, which reflects the aperture size and shutter speed combination. EV value and the scene brightness and film sensitivity is also relevant. In layman’s terms, the faster the film speed, the brighter the subject matter, the greater the EV value, the corresponding time is necessary to use a small aperture and fast exposure. Exposure compensation is to allow the photographer to determine the camera’s exposure metering of the “quantity” to amend, adjust, and thus be suitable for the performance of the main correct and accurate exposure. Volume with exposure compensation +3, +2, +1, 0, -1, -2, -3, and so on to that “+” indicates the exposure meter set the exposure based on the increase, “-” indicates less exposure, the corresponding figures for the series of exposure compensation (EV). Becoming increasingly popular digital cameras, digital cameras beautiful appearance, strong features won the consumers, but the digital camera, after all, electronic products, so in practice, or complex than traditional cameras, digital cameras, many of the term is not very understanding, which to some extent, the use of the impact of some, so we used a collection of general digital camera will appear to explain some of the words available to us, we can make better Fun own “equipment . ” 1. What is e lock? ae is the automatic exposure control device of the abbreviation AE, ae ae lock is locked to a particular set for automatic exposure control human exposure to ensure that the main exposure of normal. There are several locks to use ae to note: 1, manually or automatically self-timer can not be used when the exposure (ae) lock. 2, press the auto- exposure (ae) after the lock not to adjust the aperture size. 3 Do not use with flash photography (ae) lock. 2. What is ccd? CCD not only to “electronic coupling component” (charged coupled device), it is like traditional film cameras as the light-sensitive system is the light sensing circuit device you can think of it as those many tiny sensor particles, covered in Lens rear, when the light from the lens and image through, projected onto the surface ccd, ccd will have a current, the contents of the sensor to convert the digital data storage. ccd greater the number of pixels, the larger the size a single pixel, the images collected will be more clear. Thus, while the number of ccd image quality is not the sole focus of the decision, we can still rank it as the camera one of the important criterion. 3. What is cmos? comple-mentary metal-oxicle- semiconductor, Chinese translation, “complementary metal oxide semiconductor” is a light sensing circuit device it is now commonly used in Canon digital cameras such sensitive devices. 4. What is dpof? dpof refers to a digital print order instruction is used in the storage media (video memory card, etc.) to record information. In this format, you can set your digital camera to print those images, and how many to print. 5. What is the exif? The so-called exif (exchangerable image file format for digital still cameras), is the jeita (Electronics and Information Technology Industries Association) to develop, the decision to record a file jpeg image and sound way of additional information on the specifications. 6. What is the exif 2.2? exif 2.2 version is a new revised digital camera file format that contains the best to print a variety of shooting information. 7. What is ptp? ptp English “Picture Transfer Protocol (picture transfer protocol)” acronym. ptp is the first by a Kodak company developed in consultation with Microsoft, a standard, consistent with this standard imaging equipment in the access after the windows xp system can better be shared by the system and applications, particularly in terms of network transmission, the system can access to these devices when used to create web albums upload pictures, online chat, send pictures and so on. Of course, this is mainly limited computer knowledge to facilitate ordinary users, the camera, application software, websites together more easily …. the completion of some fool-functions. 8. What is a tiff format? tiff is a more flexible image format, which stands for tagged image file format, file extension tif or tiff. The format supports 256 colors, 24-bit color, 32-bit color, 48- bit color and other color spaces, and support rgb, cmyk and ycbcr other color mode, supports multiple platforms. tiff file can not be compressed, file size larger, it can be compressed to support the raw, rle, lzw, jpeg, ccitt3 group and 4 other compression. 9. What is a wave? This is the recording standard used windows file format, the file extension “wav”, pcm format of the data itself or compression type. 10. Image storage format digital camera captured the image file is large, storage capacity is limited, so the image is usually compressed and then stored. The most common image storage format is jpeg and tiff files, jpeg highly compressed files to make changes to the original 1 / 4, 1 / 8 or 1 / 16. more:>>www.gpbattery.co.uk

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