Digital Cameras Technical TermsPseudo-color photographs that appear dark colored stripes and noise, this is due to dark image signal is weak, reducing noise ratio, optical interference signal caused by exposed, as is the actual image should not have interference signals
Aperture (lens thread), the front of the camera lens diameter. 68. Shutter That block the light coming in front of the camera device, in general, the better the scope of the shutter time. The low number of seconds the movement for shooting objects to emphasize the shutter of a camera, the fastest models can to 1 / 16000 seconds, can easily grasp the rapidly moving target. But when you wanted to make a busy night, the shutter time is necessary to lengthen the common photo silk-like water effects should be taken out with a slow shutter. The common b SLR shutter, although by the time you are free to decide the length of exposure, shooting higher flexibility, but most of the current consumer digital cameras can not support up to provide services such as 2 seconds, 8 seconds, 16 seconds, etc. slower rate of default. 69. Shutter lag time The camera does not use focus lock function while ensuring that the work in the auto focus mode, from pressing the shutter release button to start the period of exposure is called shutter lag time. 70. Shutter Priority exposure modes We first decide the shutter speed, the camera light metering system according to the circumstances at that time, automatically selects the appropriate aperture value of f (f for non-stage of the value) to match. Exposure mode dial with a digital camera, usually engraved in the wheel 's' letters to represent the Shutter Priority mode. Shutter Priority mode is suitable for the need to control the shutter of the photography. Action can be condensed using high-speed shutter, slow shutter speed can make use of a moving vehicle into a beam. 71. Shutter delay The camera shutter, then the camera auto focus, metering, exposure calculation, select the appropriate combination of exposure data calculation and storage ... the time required for processing is called shutter lag. 72. Continuous shooting speed Continuous shooting speed (burst speed), a digital camera to go through the photoelectric conversion film, a / d conversion process and media records, including records, whether or conversion takes time, especially to spend more time recording. Therefore, all digital cameras are not fast continuous shooting speed. Currently, the fastest digital camera in continuous shooting speed of 7 frames / sec, and continuous shooting must be a few seconds after 3 seconds in order to continue shooting. Of course, the continuous shooting speed for sports photography by photographers and a good indicator of who is important to note, but do not have to consider the situation of ordinary photography 73. Burst mode Fast continuous shooting mode too, just tap the button to continuous shooting, continuous action vividly recorded. 74. Brightness Somewhat similar to the brightness and contrast are used to represent an image the relationship between light and dark areas, the difference is primarily used to represent the brightness balance between dark and light, that is, the intensity between dark and light, and light and dark contrast is determined The number of levels. 75. Polarizer Polarizer, also known as polarizer, into a round of partial (cpl) and line side (pl) are two kinds of polarized lens is the camera accessories. Light itself is an electromagnetic wave, the reflection and diffusion, the one direction of vibration will be weakened, thus becoming polarized light, and thus, smooth reflective surface and sky diffuse light is polarized, which will affect the photographic image light clarity. Polarizer can choose to have a vibration direction of light through, so using a polarizer, the reflective surface can be reduced, and pressure can highlight dark blue and white sky, the still-life photography and landscape photography, polarizing microscopy is very useful. 76. Exposure Compensation It is also a way of exposure control, the general common around the ± 2-3ev, if ambient light is dim, you can increase the exposure value (such as adjusted to +1 ev, +2 ev) to highlight the clarity of the screen. 77. Exposure Exposure is the image constitute the most critical factor in the original, it is mainly by the aperture (aperture) and shutter (shutter) two decisions. 78. Hologram AF Hologram AF function (hologram af), is a brand new autofocus optical system, using advanced laser holography technology that uses laser detection edge of the subject, even in the dark can also shoot photos of accurate focusing, Effective shooting distance of 4.5 meters. 79. Color depth Color depth (depth of color), also known as the color bits color depth, which is used to indicate the ability to distinguish color digital camera. Red, green, and blue color channels in each color for the n-bit digital camera, the color of the median total 3n, can identify the color of a total of 23n, such as a 24-bit digital camera available to a total of 2 (24 power), that is, 16,777,216 colors. Digital camera the more bits of color, which means the number can capture more detail. Digital cameras usually have 24 bits of color bits is sufficient, advertising photography and other special industries with the digital camera, usually just 30 or 36-bit color depth can be. 80. Flash Flash is one of the ways to enhance the exposure, especially in dark places, playing flash help make the scene brighter. However, characters in the film, the flash of light may be left in the pupil of the eye phenomenon occurs, and then place "red eye" scenario, many camera operators will be adding this feature to eliminate red-eye design, before opening play in the flash of light so weak the pupil to adapt to, and then run the real flash, to avoid red-eye occurs. 81. Slow sync flash Slow sync (slow) is the realization of the camera and flash with a high-level functions. Slow sync flash is in the early morning, evening or have some lighting in the evening, due to lower shutter speed, while using the flash, you can ensure that while the main exposure of normal exposure to the appropriate background and rich visuals. Slow sync, there are two modes: simultaneous pre-and post-synchronization. Preamble refers to the shutter fully open immediately after the flash, for general, easy to capture the shot opportunity, such as character and demeanor; after the synchronization means the shutter will be closed when the flash for shooting moving body, you can pull out the body's trajectory to form a strong dynamic effect. 82. Flash index gn Gn flash index reflects the size of the index of the power of the flash, the flash should be a good output stability and adjustable color temperature standard (usually around 5500k, and the sun the same), a callback, speed, can turn to change the light range. For the iso 100 light sensitivity of film or digital camera set terms, gn = aperture factor x shooting distance (m). 83. Digital photos purple fringing Digital camera purple fringing is taking the digital camera in the process of contrast because the subject is greater in high light and low light area at the junction of the phenomenon is the emergence of the stain purple digital camera (or other color). Purple fringing occurs because the dispersion with the camera lens, ccd imaging area is too small (imaging unit density), signal processing algorithms within the camera and so on. 84. Mottle or noise Variegated or noise (noise), the image pixels should not appear foreign, usually generated by the electronic interference. Looks like the image is dirty, covered with some small rough points. Cheap camera batteries http://www.sales- dell laptop battery http://www.sales- Dell latitude d600 battery http://www.sales- # # # www.global-Battery.co.uk A excellent replacement batteries source: Save more than 30%! 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