List of common terms in digital cameras
1.AE lock
AE is the abbreviation of Automatic Exposure automatic exposure control device, AE lock is locked in a AE setting, used for automatic exposure control of exposure, to ensure normal subject exposure.
There are a few things to note when using AE locks:
1. The automatic exposure (AE) lock cannot be used in manual mode or self-timer.
2. Do not adjust the aperture size after pressing the AE lock.
3. Do not use (AE) lock when shooting with flash.
2.CCD
The Chinese is translated as "Charge Coupled Device". It is like the negative film of a traditional camera. It is a circuit device that senses light. You can think of it as a tiny sensory particle covered by an optical lens. When the light and the image are transmitted through the lens and projected on the surface of the CCD, the CCD generates a current and converts the sensed content into digital data for storage. The larger the number of CCD pixels and the larger the size of a single pixel, the clearer the collected images will be. Therefore, although the number of CCDs is not the sole focus of determining image quality, we can still regard it as one of the important criteria for camera grade.
3.CF flash memory card
A compact flash card (Compact Flash Card). Insert a digital camera like a PC card, which can be used as an adapter (also known as a riser card) to adapt it to a standard PC card reader or other PC card device.
Part of the structure of the CF memory card is made of reinforced glass and metal casing. The CF memory card uses the Standard ATA/IDE interface and is equipped with a special PCM-CIA adapter (Adapter Card). Users of notebook computers can use directly on the PCMCIA slot. This makes it easy to transfer data between a digital camera and a computer.
4.CMOS
Comple-mentary Metal-Oxicle-Semiconductor, translated as "Complementary Metal Oxide Semiconductor"
5.GT lens
GT Lens refers to the uniquely designed multi-piece and multi-piece lens assembly of Minolta. The lens lens uses high-grade low-dispersion optical glass, which includes multiple molded aspherical lenses and so on. In other words, the lens used by Minolta's G-series high-end professional traditional cameras (silver-salt camera) is called an AF lens, and Minolta has applied the process technology for the production of G-series lenses to the design and production of digital cameras. It is called GT lens.
6.iESP autofocus
iESP Abbreviation for English Intelligent Electro Selective Pattern. iESP autofocus is a digital camera that performs multi-block segmentation within the focus range (there is a segmentation method called segmentation for the data), and then combines the measured focus position of the segment block to determine the best focal length based on the subject's different states. . iESP autofocus is often seen in the introduction of Olympus digital cameras.
7. IrDA infrared interface
IrDA is the English abbreviation of Infrared Data Association (IRC). IrDA infrared interface is an infrared wireless transmission protocol and wireless transmission interface based on the protocol. Digital cameras that support the IrDA interface can wirelessly transfer digital photos to other devices that support IrDA communications, such as laptops or printers.
8.ISO sensitivity
The ISO sensitivity value is a measure of the sensitivity of a conventional camera film to light. Usually expressed as an ISO number, the larger the number, the stronger the sense of rotation. The commonly used methods of expression are ISO 100, 400, 1000, etc. In general, the sensitivity The higher the degree, the thicker the particles of the negative film and the poorer effect after amplification, while the digital camera also applies this ISO value to mark the exposure used by the light metering system. The lower the reference ISO, the higher the exposure required.
9. LCD viewfinder
This is the essential way of viewing for most digital cameras. The only advantage of LCD viewing is the only drawback of correcting the normal optical viewfinder. However, just like Windows 98, the bug of Windows 95 is corrected and more BUGs are generated. Look at the shortcomings of the LCD viewfinder: First, the LCD is a large consumer of electricity, he wants to occupy the entire camera more than 1/3 of the power; Second, the LCD viewfinder posture must be hands stretched, keep a certain distance from the eyes, then the camera can not be obtained With stable triangle support, it is difficult to shoot a stable and clear photo with a slow shutter speed. Finally, the color and contrast of the image displayed on the LCD are inaccurate with the actual image actually seen on the computer, and even the nominal megapixel LCD is It looks like the picture is still rough and you can't observe the detail of the subject. In the face of this picture, you can't judge whether the picture you take meets your requirements. Fortunately, the digital camera is equipped with ordinary optical view and LCD viewfinder at the same time. If you purchase a digital camera with only an LCD viewfinder, there is a certain risk unless you have enough confidence to get the desired effect.
10.LCD viewfinder
That is Liquid Crystal Display, LCD screen. There are black and white and color, color and true color and false color points, pseudo-color cheap, but the effect is poor. The LCD used for framing and playback in digital cameras is almost always the best TFT color. In the TFT LCD, there are two kinds of reflection and transmission. The reflection type reflects the frontal ambient light, and the difference is larger from different angles. The display is darker, but the power is saved and the manufacturing cost is low; the light work after the transmissive backrest has small angle change. , The display is bright, but it is extremely costly. 11. PC Card Converter
A connector that can insert a CF card or SIM card into it. Then, it is inserted as a PC card into the PCMICA socket of the computer. This is a universal expansion interface commonly used in portable computers, and can be connected to a PCMICA memory card, PCMICA hard disk. PCMICA modems, etc.
12.SM flash memory card
That is, Smart Media, a smart media card, a storage medium. SM card uses SSFDG/Flash memory card, has ultra-small ultra-thin and ultra-light characteristics, volume 37 (length) × 45 (width) × 0.76 (thickness) mm, weight is 1.8g, low power consumption, easy to upgrade, SM The conversion card also has a PCMCIA interface to facilitate user data transfer.
13.TIFF format
TIFF is a more flexible image format, its full name is Tagged Image File Format, file extension TIF or TIFF. This format supports 256-color, 24-bit true color, 32-bit color, 48-bit color, and many other color bits. It supports multiple color modes such as RGB, CMYK, and YCbCr, and supports multiple platforms. TIFF files can be uncompressed. The file size is large and can also be compressed. It supports RAW, RLE, LZW, JPEG, CCITT3 and 4 groups and other compression methods.
14.TTL metering
That is TTL Light Measuring. Through the lens to measure the amount of light, with the filter exposure, aperture focal length and other parameters have nothing to do. The metering methods are divided into average, local, and center-weighted metering. Any kind of metering method is very similar, but like the lighting method such as backlighting, the contrast between the light and darkness of the subject is extremely different, or different methods such as microphotography are different.
15.TTL single-viewfinder
This is a must-see viewfinder on a professional camera, and it is also an optical viewfinder with no error. This viewfinder's viewing range can reach 95% of the real shot. The only drawback is that if the lens is too small, the viewfinder will be dark, affecting the manual focus. Fortunately, autofocus is now available, and this drawback is no problem. Of course, with the TTL SLR viewfinder in order not to be too dark, manufacturers will use large-caliber advanced lenses, so generally semi-professional cameras are equipped with such lenses. This type of viewfinder is often used on Olympus cameras.
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