How to choose a memory card suitable for your SLR camera
Tools/raw materials
What is a TF card?
What is an SD card?
What is a digital camera belt?
What is a Sony memory stick?
What does the category of memory card mean?
What is the difference between SD card and SDHC card and SDXC card?
What is a card reader?
Methods/steps
What is a TF card?
TF card, also known as T-Flash card, full name: TransFLash, also known as Micro SD, was jointly developed by Motorola and Sandisk * * * and launched in 2004. It is an ultra-small card (11*15 *1mm), which is about 1/4 of the SD card, so it can be regarded as the smallest memory card at present.
TF is a small card, SD is a big card, and they are all flash cards. TF card has the smallest volume and can be used as SD card after SD card conversion. Adapters can be used on devices that use SD as storage media. TransFlash is mainly developed for camera phones, which are used to shoot large images and download large video clips. Transflash card can be used to store personal data, such as digital photos, MP3, games, mobile phone applications and personal data, and has a built-in copyright protection management system to protect downloaded music, images and games. In the future, the new TransFlash will also be equipped with encryption function to protect personal data, financial records and medical care documents. The compact TransFlash allows the manufacturer to adopt this design without worrying about the size of the mobile phone. Another flexible application is that the supplier can replace it according to the different needs of customers at any time before delivery, which is an advantage that embedded flash memory does not have. function
MicroSD card is a very small flash memory card, and its format originated from the creation of SanDisk. Originally, this memory card was called T-Flash, and TF card (3 cards) was renamed TransFlash. It was renamed microSD because it was adopted by SD Association (SDA). Other memory cards used in SDA include miniSD and SD card.
It is mainly used in mobile phones, but because of its small size and increasing storage capacity, it is used in GPS devices, portable music players and some flash drives.
Its volume is15mm x11mm x1mm, which is almost the size of a fingernail. It is the smallest memory card at present. You can also connect to the SD card slot through the SD adapter card. At present, the MicroSD card provides the capacities of 128MB, 256MB, 5 12MB, 1G, 2G, 4G, 8G, 16G and 32G.
What is an SD card?
SD card is the abbreviation of secure digital card, which is literally translated into Chinese as "secure digital card". It is a brand-new memory card product jointly developed by Panasonic Corporation of Japan, Toshiba Corporation and SANDISK Corporation of the United States. SD memory card is a completely open standard (system), which is mostly used in MP3, digital cameras, digital cameras, e-books, AV devices, etc., especially ultra-thin digital cameras. SD card is consistent with multimedia card in appearance, slightly thicker than MMC card in size, and has much larger capacity. And compatible with MMC card interface specification. People can't help but suspect that SD card is an upgraded version of MMC. In addition, the SD card has nine pins, which aims to improve the transmission speed by changing the transmission mode from serial to parallel. Its reading and writing speed is faster than MMC card, and its security is higher. The biggest feature of SD card is that it can ensure the security and confidentiality of data through encryption function. It also has copyright protection technology, which is the CPRM technology (recordable media content protection) used in DVD. Characteristics of several brands of SD cards
At present, there are many SD card brands on the market, and well-known brands have their own characteristics.
Sandisk: Sandisk brand SD card is probably the most common one on the market. "Blue cards" like this can be bought in almost every digital specialty store. In fact, the SD cards of Sandisk are not all low-speed, and there are also high-speed models (black cards), but it seems that they are not sold in the local market at present.
KINGMAX: As a manufacturer of branded memory, Kingmax has been committed to the research and development of memory cards in recent years. It adopts a unique integrated packaging technology (PIP), which makes it difficult for counterfeiters to copy. Kingmax SD card has the highest transmission rate of 10MB/ s, and is waterproof, shockproof and compressive, which can meet various requirements of field shooting.
Panasonic: As the founder of sd standard, Panasonic's technology can be said to be one of the best SD cards on the market. It's just that most Panasonic SD's on the market have no warranty, so you must ask the important question of warranty period when you buy them.
Kingston: As the world's largest memory manufacturer, Kingston's SD card omits the interface circuit, so it is the smallest one among many flash memory products (the size is only one stamp and the weight is less than two grams), which is why many digital cameras, MP3 players and PDA products choose SD card as the storage medium. It is difficult to enlarge the capacity of SD card just because of the product size. In addition, Kingston's SD card products all provide a five-year warranty.
What is a digital camera belt?
Digital camera tape is a kind of tape material with magnetic layer, which is used to record sound and images. Other materials compared with adhesive tape:
1, portable, lightweight, smaller, and easier to grow, can buy various storage capacities and different reading and writing speeds for different devices, forming different price points for different consumers to choose from.
2, higher safety, longer service life, long-term reuse and lower relative cost. It is more moisture-proof, suitable for working in more climatic conditions, easy to exchange and spread, can be carried in large quantities, and can quickly copy and transmit data. The dual-card machine can replace the memory card without shutting down, which avoids the influence of changing the recording medium on the recording picture when standing alone.
3. The data record is more complete, basically there will be no mosaic phenomenon, and full-mode data can be recorded. At present, the recording time of full HD tapes on the market is much shorter than that of standard definition, and the relative cost will also increase. If the tape length increases, it will be a new challenge to the whole servo system, and the whole industrial chain needs to be adjusted. No manufacturer is willing to do this. There is an industrial bottleneck in recording high-compression video data with the current tape speed, which is not suitable for the development of the times, so the full HD mode of civilian cameras recorded with the current tape is basically not seen in the market.
What is a Sony memory stick?
Memory stick, also known as MS card, is a removable flash memory card format storage device, which was made by Sony and launched in the market in 1998+ 10. It also summarizes the whole memory stick memory card series.
This series includes Memory Stick PRO (allowing better maximum storage capacity and faster transmission speed), Memory Stick Duo(Memory Stick format version, including PRO Duo) and Memory Stick Micro (M2) smaller than Duo.
Memory stick family is very large and varied. Generally speaking, it can be divided into the following categories: blue memory stick, commonly known as "blue bar", is the most used memory stick, mostly used in digital cameras and digital cameras. With copyright protection function, it is mostly used in Sony's digital walkman; "Memory stick Pro" is a newly released memory stick specification, and there is no Chinese name at present. It not only has the same copyright protection function as the white strip, but also is very fast, with a capacity of 32GB. "Memory stick DUO" is the smallest memory stick family at present. It can be compatible with the memory stick interface through the adapter. Also divided into blue and white. The blue one is called "memory stick DUO", and the white one is called "memory stick PRO MAGICGATE", which has copyright protection function and larger capacity. Characteristics of memory stick
The advantages of memory stick include compact appearance, high stability, copyright protection function and convenient use in various memory stick series products, as well as a large number of products introduced by Sony that make use of this technology, such as DV cameras, digital cameras, VAIO personal computers, color printers, walkman, IC tape recorders, LCD TVs and so on. , as well as PC card converter, 3.5-inch floppy disk converter, parallel export converter, USB reader and other full range of accessories, so that the memory stick can easily connect PC and MAC.
After the introduction of memory stick, a series of companies such as Samsung, Aihua, Sanyo, Casio, Fujitsu, Olympus and Sharp all expressed their support for this format. Sony is still seeking the recognition of memory chip format in the home appliance industry and IT industry. Sony will introduce more products representing the latest development of memory sticks to the domestic market in the future.
The disadvantage of memory stick is that it can only be used on Sony digital cameras and PSP, and its capacity is not large enough.
On the basis of memory stick, Sony reduced the size to about 1/3, and designed and manufactured the memory stick Duo, with an external dimension of only 3 1? 20? 1.6mm, and the weight is doubled to 2g, which is very similar to xD card and very convenient to carry. This memory stick Duo is very convenient to be used in quite compact mobile phones and digital cameras, as well as mp3 players and other electronic products.
In order to obtain greater capacity and higher speed, Sony has launched a brand-new memory stick PRO, which is jointly developed by Sony and Sandisk. Compared with the memory stick, the external volume has not changed, but it can achieve 8GB capacity. Old equipment will not be able to use this new memory stick PRO, but digital products with memory stick PRO slots can be backward compatible and use traditional memory sticks. In addition to serial transmission, Memory Stick PRO also supports parallel transmission, which enables simultaneous transmission and reception of various data. In parallel transmission mode, data is transmitted at a speed greater than 160Mbps (theoretical value), which makes it possible to record DVD-quality dynamic images in real time. With this high speed, Memory Stick PRO can also support advanced solutions brought by the coming broadband era. Memory stick PRO does not distinguish between blue and white stripes, and all memory stick PRO have copyright protection function.
What does the category of memory card mean?
SD Association's transmission specification for TF memory card (SDHC): the transmission speed (the lowest speed of writing speed and reading speed) is defined as Class2(2MB/sec), Class4(4MB/sec), Class6(6MB/sec) and Class 10( 10MB/sec).
In the specification of SD2.0, the performance of SD card is divided into the following grades, and different grades can meet different application requirements respectively:
Category 0: including cases below category 2 and unmarked speed category;
Category 2: it can meet the requirements of watching ordinary MPEG4 MPEG2-2 movies, SDTV and digital camera shooting;
Category 4: continuous shooting, which can smoothly play HDTV and digital camera.
Category 6: Meet the use requirements of SLR camera continuous shooting and professional equipment;
10 class: storage requirements to meet higher speed requirements.
What is the difference between SD card and SDHC card and SDXC card?
SD card, SDHC card and SDXC card have different specifications. SD card can support up to 2GB capacity, SDHC can support up to 32GB capacity, and SDXC can support up to 2TB(2048GB) capacity. Digital equipment supporting SDXC card is compatible with SDHC card. If the device only supports SDHC card, then it cannot use SDXC card, but it is compatible with SD card. If the device only supports SD card, it is not compatible with SDXC and SDHC cards.
SD is an earlier version, which is said to have evolved from MMC. Supports a maximum capacity of 2GB.
SD memory card is a small storage medium developed by Panasonic, Toshiba and Sandisk in 1999. While introducing SD memory cards, secure digital memory card Association (secure digital memory card Association; SDA) Formulate relevant specifications and be responsible for the promotion of SD memory cards. After years of development, SD card has become the most popular electronic product memory card format in the world, which is suitable for mobile phones, digital cameras (DSC), MP3 music players, personal computers and other electronic products.
SDHC is a large-capacity SD card, that is, SD has a high capacity, which can support a maximum capacity of 32GB.
SDHC, secure digital high-capacity, large-capacity SD, that is to say, SD above 2G is called SDHC, because the early SD used FAT 16 file system and did not support large capacity. SDHC was upgraded to FAT32 and only supported large capacity above 2G.
SDXC(SD Extended Capacity) is a new standard released in 2009, which supports a maximum capacity of 2TB.
SDXC is the abbreviation of SD expansion capacity, and it is a newly proposed standard. Besides the capacity can be upgraded to 2T at most, it can mainly support the transmission speed of 300M/s, which means it is a "high-speed SD" card. However, there are not many digital cameras that support SDXC cards, mainly new products introduced this year. There is no SDXC for backward compatibility, and ordinary SD and SDHC card slots and card readers are not supported.
For most digital cameras and SLR, the speed of high-speed SDHC memory card is enough to achieve high-speed continuous shooting and high-definition video shooting.
What is a card reader?
When it comes to card readers, many people think that this product is made of digital cameras, but it is no longer limited to digital cameras, but has expanded to more fields. As the name implies, "card reader" is a device that reads data, but it can not only support data reading, but also support data writing. Its initial design idea is mainly to make up for the defects of digital camera data output. Because the early USB interface has not been popularized, the output ports of digital cameras are all connected with the serial port of the computer. Because the data transmission speed of serial port is very low, it takes a long time to copy these data to hard disk. Card reader classification
From the interface, the card readers mainly include parallel port card reader, serial port card reader, USB card reader, PCMICA card reader and IEEE 1394 card reader. The first two kinds of card readers have been basically eliminated because of the slow interface speed or inconvenient installation. At present, the most popular card reader in the market is USB card reader, and PCMICA card reader is mainly used in notebook computers, while IEEE 1394 card reader is not widely used because its supported interfaces are not yet popular.
The main flash cards or multimedia cards on the market are SM card, CF card, MicroDrive, MemoryStick, MemoryStickPRO, MMC card, microsd card, MiniSD card and SD and xD cards. According to the type of flash memory reading, the card reader is divided into single-function card reader and multi-function card reader. Generally, a single-function card reader can only read one type of flash memory card. For example, CF card readers can only read CF flash cards, while SM card readers can only read SM flash cards. The price of this kind of reader is relatively low, as long as 100 yuan; The multifunctional card reader can easily read all kinds of flash cards, whether SM cards, CF cards or MemoryStick, but the prices of such products are slightly higher, ranging from 200 to 500 depending on the types of flash cards read. Card reader use
Different models of Samsung's notebook computers support different memory card models, but according to the experience of the notebook computer market, Samsung's notebook computers generally support multiple memory cards. The most common configuration is the black bezel seen by the three-in-one card reader (supported memory card types are SD card, MMC card and MS card). It may not be the bezel of the card reader, but the bezel of the PCMIAC slot, which is a general expansion slot of notebook computers and much larger than the card reader slot. Moreover, the baffle is being designed.
The use process is as follows:
1. First, determine the type of memory card at hand.
2. Confirm the support type of the built-in card reader in the notebook computer and whether it supports the memory card at hand.
3. After confirming that the built-in card reader of the notebook computer supports the memory card at hand, find the correct card reader slot, and then insert the memory card (if there is a metal node, insert it face down). The memory card can only be inserted in the right direction, so you can try it gently.
4. If the memory card is not the type supported by notebook card reader, you can buy a multifunctional card reader with USB interface.
Choose the right memory card for your SLR camera:
1. How to choose the memory card of SLR camera?
2. How to install the memory card of Canon SLR camera?
3.20 17 which SLR camera should I choose to get started?
4. How to choose a memory card
5. Novice users recommend SLR
6. Skills of purchasing SD card