Most consumer digital cameras for sale today still use standard SD cards. They measure 32x24x2.1mm and weigh just two grams. Standard SD cards are the largest, although they’re still pretty small. You’ll find standard SD cards, miniSD cards, and microSD cards.
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These cards were designed and produced before the speed class rating system was introduced. If you see no speed class symbol, you have a class 0 SD card. For example, in the below photo, the SD card has markers for speed class 10, UHS speed class 3, and video speed class 30. You’ll also see the speed class on the online store listing or on the card’s packaging when purchasing it. Even a cheap smartphone can record HD video, after all.Īn SD card’s speed class is identified on the SD card itself-just look for the logo. Class 2 cards are a bit on the slow side these days, so you may want to avoid them for all but the cheapest digital cameras. Class 10 cards are ideal if you’re shooting high-resolution videos or RAW photos. You’ll probably be okay with a class 4 or 6 SD card for typical use in a digital camera, smartphone, or tablet.
Here are the associated SD class speed logos: SD Association These classes include V90 (which supports up to 8K video recording), V60 (4K recording), V30 (HD/Full HD video), and V10 and V6 (standard video). These markers are mainly intended for devices designed for professional use, but you’ll find them on most of today’s SD cards.Īnd lastly, there are Video Speed classes. There are also two Ultra High Speed (UHS) speed classes, 1 (10MB/sec read/write speed) and 3 (30MB/sec). Classes 4 and 6 are both deemed suitable for high-definition video recording. Class 10 is the fastest, suitable for “full HD video recording” and “HD still consecutive recording.” Class 2 is the slowest, suitable for standard definition video recording. There are four different speed classes: 10 (10MB/sec read/write speed), 6 (6MB/sec), 4 (4MB/sec), and 2 (2MB/sec).