For camera users, almost all will come into contact with the SD card, then you really understand the SD card? Today we will talk to you in detail about the SD card knowledge ~
Family Members of Memory Cards
At present, the SD card family is divided into SD cards, miniSD cards, and microSD cards according to the product size.
SD card was jointly launched by Panasonic, Toshiba, and SanDisk, and released in August 1999. Since the launch time has been relatively long, the SD card standard has overlapped many times. However, it must be mentioned that even though the standard has overlapped with multiple versions, the SD card slot is still backward compatible.
Although I’m sure there are many people like me who still have several SDHC cards in their hands, these cards are already very old. The mainstream SD cards on the market today are already SDXC cards, while the more future-oriented SDUC and SDexpress are still the latest technical standards and have not yet been introduced to the market.
In addition to capacity, speed is one of the decisive factors in deciding whether an SD card is good or bad, and each card will have a label that justifies the minimum performance level, or the speed will be marked directly on the card’s surface. So consumers nowadays, don’t need to study what each label means, they just need to pay attention to the speed and UHS type of each card.
At present, the mainstream SDXC card is mainly divided into two kinds of UHS-I and UHS-II, the method of differentiation is very simple, in addition to the label on the card surface, the SD card is turned over, there are double rows of contacts is UHS-II, faster, while the single row of contacts is UHS-I, the price is cheaper. I collected SD cards in the company and found that our Shanghai office still chose the speed that is more moderate and cost-effective SD cards, you should be able to see which models.
At present, most of the high-end cameras equipped with an SD card slot basically have a card slot compatible with UHS-II read and write speed, and at the same time, the purchase of SD cards does not have to worry about compatibility issues, even if the card slot does not support UHS-II, but also just can not play the performance of the UHS-II card.
At present, the most powerful SD card should be Sony’s TOUGH series cards, with certain triple defense performance and 299MB/s write speed, the price is only a little more expensive than the same speed but not with triple defense performance Sony G card. Cross-class analogy SD card is currently inferior to XQD and CFast2.0 card in speed, so the SD card standard upgrade has also been on the agenda.
Micro SD cards
The microSD card, also called TF card, is more widely used in portable devices and aerial cameras and can be used as a standard SD card through the card sleeve, which is better than the standard SD card in terms of cost performance, while slightly losing in terms of specifications and stability.
Unlike standard SD cards, microSD cards are smaller in size and cannot directly write the parameters of reading/writing speed on the card surface, making them more troublesome to purchase. Although these four microSD cards are my own, which card can be stable recording 4K 60P videos, I myself will often be confused (I only know SanDisk this red and gold color scheme of the fastest card, insert this one is correct).
And I also have some friends around to shoot 8K 60P timelapse often complain about cheap buy microSD cards that can not do 1 / second stable time-lapse shooting. Of course, for normal time-lapse photography, a microSD card the cost advantage is still relatively obvious.
Even in the production of microSD card mainstream brands, there is often this kind of unclear writing parameters of the card, and different capacities of the same microSD card may have different reading and writing speeds. So if you want to use a microSD card as a standard SD card, I personally do not recommend it, easy to step on the mine.
As for product recommendations, the cards shown above are the products we are currently using (except SDHC cards), if you have any questions, please feel free to ask!