With digital cameras, MP3 players, PDA and other digital products, growing popularity, and their accessories have also been closely related to the consumer more and more attention. Such as digital camera memory card, it does not in itself affect the quality of shooting, but the use of the camera has played a vital role. .
We all know, digital camera photos are mainly stored in other purchase bulk storage, and now everyone in the market to see some of the major memory card: SD/MMC, CF, MEMORYSTICK (DUO), XD. It should be said that, after several years of rapid development of the market, as important parts of a digital camera memory card market has basically formed the pattern: CF card: occupy professional digital camera market. SD card: appropriating fashionable machine share. MEMORYSTICK (memory stick): SONY still unique. XD card: Olympus / Fuji hard support. .
Of course, each brand cameras support only one memory card type (a small part of the high-end models support multiple storage cards at the same time), such as SONY only support your memory stick series; the Olympus/Fuji XD cards only support, i.e. cheaper SD or CF cannot be used on its machines. While their prices have been high. In the present case, the XD card on sale at $ 260 128M, almost equal to the price of the SD card 256M. The SD card is due to the use of open technology standards, supports SD cards up to the manufacturers, it also makes the SD card price is cheaper. Therefore, in the selection of camera models, but also do not forget to consider memory card prices. With digital cameras, MP3 players, PDA and other digital products, growing popularity, and their accessories have also been closely related to the consumer more and more attention. Such as digital camera memory card, it does not in itself affect the quality of shooting, but the use of the camera has played a vital role. .
As digital cameras, MP3 players, PDA and other digital products, and they are closely related to the accessories are also affected by consumer more and more attention. For example, digital camera memory card, it is not in itself affect the quality of shots, but the camera has played a crucial role.
Various types of digital memory card, memory card specification is not the question of reunification so many friends in the choice of digital cameras often some confusion. Recommended as greatly accelerates when digital cameras will also take into account what is the use of memory cards, because the resulting intense competition in the market, the profit body is not much, but many dealers profit from the memory card, buy a digital camera memory card on the cost greatly. .
The popular memory card types there are four main: CF card, SD card, MS memory stick and XD cards. The most widely used CF card, prices are four products in the most inexpensive; SD card compact, the scope of a catch up with the CF card, price and CF card is slightly more expensive than; MS memory stick only SONY device support, the scope is narrow and the price is very expensive; XD card is mainly used in the Olympus and Fuji machine, prices were relatively high.
Second, the market has a small amount of SM cards, MMC cards, memory cards will be eliminated sales, because the market does not directly support these new products, mostly to upgrade the old model used by digital cameras. For those who use professional, semi-professional digital camera, or users who work long hours outdoors, micro hard drives (Microdrive) is a good choice, but the price is high, but the unit volume price of under far lower than other memory card device. .
Next, we'll look at a variety of specific storage card.
1. . CF card. .
CF card known as the "Compact Flash" cards, were the first to launch storage card products, from the largest FLASH MEMORY manufacturers of u.s. SANDISK in 1994 successfully developed.
CF card is the most widely used memory card, because it does not take the drive, and no other moving parts, therefore, very few mechanical problems, so that the stored image data more secure. CF cards are also very long service life, even spend more than 100 years can guarantee that the data intact. CF card and power consumption is small, only 5% of normal hard drive. Compared to other memory card, CF card capacity is another big advantage of the current mainstream products have reached the standard of 512Mb and 1Gb. It also has fast, cheap and so on.CF cards main drawback is that the CF module in the equipment and the installation program does not exist between the interchangeability and cannot be directly run the program, power consumption, which is bound to affect the battery life time, etc..
Way from the packaging point of view, CF memory card can be divided into type I and type II, from the appearance point of view, CF Type I and Type II are similar, both based on the ordinary 50-pin interface design, but differ in thickness , Type II type CF Type I card is approximately twice as thick. CF TYPE I only support digital cameras can not use CF TYPE II-type card, but using CF TYPE II digital camera, you can backward compatible with CF TYPE I. .
2. .SD card.
SD card full name "Secure Digital Card" card, by Panasonic Corporation, Toshiba Corporation and the U.S. SANDISK jointly developed a new memory card. .
SD card appearance consistent with the MMC card, MMC card size ratio, capacity is much bigger. And a compatible MMC card interface specification. Not let people suspect that the SD card is MMC upgrade version. In addition, the SD card to 9 pin, designed by transmission by serial into parallel to improve transmission speeds. It's read and write faster than MMC card faster, and at the same time, the security is also higher. SD card is characterized by the largest through encryption, you can ensure that data security and confidentiality of information. It also has a copyright protection technology used in DVD copyright protection technology is the technology used in CPRM (Content Protection Recordable Media). .
3. .MS card memory stick.
MS cards all called "Memory Stick" cards, the Chinese name is Memory Stick. Its appearance is a long strip, a memory card in the name of chewing gum. Sony Memory Stick currently being used in digital cameras, digital cameras, music players and Sony's CLIE handheld Palm systems such as several digital products. .
Sony memory stick development through several stages, memory stick (blue bar and LUCF), memory stick DUO-double-sided 2 × 128MB memory stick, memory stick PRO, memory stick PRO Duo.
The advantages are: high reliability, because it uses no moving space electric crystal structure, so the design of memory stick capability is highly resistant to vibration. The joints and pins have been very good seismic processing, and memory stick only 10 pins, a longer length can better ensure the reliability of data exchange; with self-cleaning design, because of their oriented slot is tilted, so when memory stick is inserted into the slot, the dust will be automatically removed.And unique guiding slots can prevent users from direct contact with the connected PIN to prevent dust or static on the memory stick; delete switch on the back of the prevention, to enable the user to avoid accidentally losing important content and data.
Disadvantages: Technical closed, Sony Memory Stick is basically only the production and sales, and can only use Sony's digital products, and now there are few if lexar, Sandisk and other manufacturers produce MS card; price is too high you in the purchase of Sony Memory Stick important reason for hesitation time, but other types of memory cards with the recent price cut more, MS cards also will drop the price a lot. .
4. .XD.
XD cards from Olympus Corp. and Fujitsu Ltd. of Japan jointly launched a new type of memory card, there is an extremely compact form factor, only a postage stamp. Dimensions only 20 × 25 × 1. .7 Mm, weighing only 2 grams. In the memory card in the field can be described as the smallest of the. .
Its read and write faster, reading speed, write 5MB/S 3MB/S speeds, large amount of data written to the comparison of power consumption, low. XD cards at present mainly Fuji and Olympus digital cameras use price comparison. However, as with the Flash memory chip and other memory card price, the price has dropped a lot of space.
5. . Microdrive microdrive. .
From IBM Microdrive to CF standard development platform is based on the magnetic recording for the original mobile storage media products. Now that almost all micro hard disk c F Ⅱ interface standard, on the basis of the CF has expanded the storage space and improved electrical properties.
Micro Microdrive hard disk drive with the traditional internal structure similar to the complexity of no less than the traditional hard drive. By: Disk film magnetoresistive heads (GMR), the control circuit, spindle motor and the interface circuit combination. .
The Microdrive drive technology with low-cost, high-capacity characteristics, its biggest advantage is the price per unit storage capacity than other storage cards to low; transfer speeds compared to other storage cards a lot faster, but in power consumption and heat shock resistance and. at.
The optional memory card principle. .
Although cohabitation in the storage market, but they still operate, as long as you master the essentials to avoid unnecessary trouble. In order to avoid buying to sell storage card, I came to talk about and purchase genuine memory cards, and purchase of common mistakes.
1. . Look and work. Purchase should start start the appearance, just as the same as the purchase of other computer accessories. We must note that the print quality is clear packaging, with or without anti-counterfeiting labels, verify that the phone if the best spot, call to verify its validity, then personally opened, view attachments, such as card sets, brochures, stickers are complete write-protected Finally look at the whole card manufacturing process, whether there is deformation, embossing and cracks on the card with or without flash and other undesirable phenomena. .
2. compatibility. Different brands of digital camera storage cards and also exists between some incompatibility issues. Incompatible conditions generally in the form of slow access, card reader for too long, even with a panic, so it is best to personally go with machine dealer on the card, the guarantee card matches with the machine. Sometimes it is necessary to pay attention to different models of the same type of card brings compatibility issues. For example, CF card into the TYPEI and T Y P E Ⅱ. In addition to the storage card's voltage is the same as the voltage of the camera offers will also be taken into account.
3. . Service. Memory card manufacturers in general are committed to one year replacement, consumers are sure to ask the best manufacturers in the product description on a written promise. Remember the last invoice, not to save a few dollars that the price of not billing win, until the problem has been regret. .
4. access speed. With the digital camera's image sensor pixels have higher precision for the photo quality, these increasingly demanding high-performance digital cameras when shooting high resolution photos, needs to be volume exceeding 1M fast storage of picture files to a storage card, this card's access speed is more important. Different grades of storage card on the speed of access may be significantly different from dozens of times, and different memory cards use the same camera, the speed will vary. Of course, if conditions permit, can find a selection of large-capacity high-speed card.
In addition, in the purchase process, we should pay attention to recognize the secondary, so shoddy repair storage cards. First, to confirm whether the repackaged package traces, open the memory card packaging, confirm whether the surface of the plate sticker stain; Secondly, look memory cards around the shell of plastic material with or without scratch, especially both sides of the insert slot whether boot was significantly insertion of traces; last look at the foot end is inserted into the hole part of the availability of the plug socket when the pin is worn inside the camera scratch situation. If the above points checked, found no problems, the basic block is not sure the card is opened through the new card. .
Storage card maintenance and proper use.
Memory card is more delicate of the East, casual use, handling, may result in loss of information stored on the card, or even damaged. Here are a few use the memory card should pay attention to:. .
Do not hot-swappable.
Boot mode, digital products may be processed or stored data, or if the card check card, likely to cause damage or data loss of digital products. .
The card you want to put in place.
When the card hard to even, and the card should pay attention to the position, on a certain type of memory card, only to specify the location into a digital camera. If mount CF card, you must wait until the camera's memory card release button pop up. When installed, to ensure a good switch off. .
Check out carefully.
Long time do not use the digital product, shall remove the memory card. For press release that key can only remove the memory card, take card to be especially careful, because the card is very easy to pop up, to avoid the fall to the ground. .
Data transfer service.
When digital cameras, video cameras memory card full of data, you should dump the data as soon as possible inside the computer or digital companion on the memory card in order to reduce damage as a result of the risk of data loss. .
Carefully formatted.
And the computer's floppy disk into use before the need to deal with the same format, memory card must be stored in the format the processed image data. Format should pay attention to use the "delete all" function to delete all the images on the memory card, and processing can not open the digital camera memory card stores the cover, is also not allowed to close the digital camera. Do not format Memory Card in the computer; too much on the storage card format has some damage. .
Work against vibration.
When the memory card at work, excessive vibration may result in data errors or missing. .
Environment from three high.
Avoid high-magnetic, high temperature, high humidity, use and store, do not place the memory card or direct sunlight, heat, and to avoid static electricity, magnetic fields. .
Collection pressure-proof.
Do not exert pressure on the memory card, bend the memory card, memory card to avoid the drop and by the impact. Some users remove the memory card will be left unattended, such as plug in the wallet, it is very easy to store Cain deformed by external force, or even broken. Best memory card on the antistatic bag, or special storage box for safekeeping. .
Current Changsha market digital storage cards in the retail prices at a glance.
SANDISK (5 year warranty). .
128M CF $ 130.
256M CF 220 元. .
512M CF $ 320.
1G CF 580 元. .
256M SD 220 Yuan.
512M SD 370 元. .
$ 1G SD 640.
128M MS 220 yuan (short rod). .
256M MS 330 $ (Trainer).
256M MS 340 yuan (short rod). .
$ 330 256M XD.
128M mini SD 170 元. .
KINGSTON (life assurance).
128M CF 125 元. .
256M CF $ 200.
512M CF 330 元. .
$ 570 1G CF.
256M SD 200 元. .
$ 512M SD 360.
KINGMAX (lifetime warranty). .
256M CF $ 220.
128M MMC 135 元. .
$ 220 256M MMC.
512M MMC 380 元. .
$ 700 1G MMC.
256M miniSD 260 元. .
$ 512M miniSD 465.
256M miniMMC 260 元. .
512M miniMMC $ 445.
PQI. .
128M MMC $ 125.
256M MMC 210 元. .
$ 370 512M MMC.
128M SD 125 元. .
$ 256M SD 205.
512M SD 350 元. .
128M miniSD 150 Yuan.
256M miniSD 245 元. .
$ 512M miniSD 410.
128M miniMMC 150 元. .
256M miniMMC $ 235.
512M miniMMC 390 元. .
SONY。.
128M MS 140 yuan (long stick). .
256M MS 270 (black rod).
128M MS 260 yuan (blue short rod). .
$ 256M MS 340 (black Club).
512M MS 650 yuan (black short rod). .
OLMYPUS。.
128M XD 190 元. .
$ 320 256M XD.
