Cameras that use CFast include the Canon EOS-1D X Mark II, Canon XC15, Canon EOS C200, BlackMagic, ARRI, and others. Unless your camera specifically requires a CFast card, then it’s likely you won’t need one. Supported by Sony and others, Type A offers performance three times faster than the fastest UHS-II cards, with 800MB/s read, and 700MB/s write on SONY and PROGRADE cards.Ħ4GB CF cards are available for around £40 – £70 depending on speed, however, it’s worth noting that the fastest cards available offer around 160MB/s, a speed surpassed by UHS-II SD cards, as well as other cards such as XQD, and CFexpress.ĬFast is yet another memory card format, designed primarily for video, CINE and broadcasting use. If both speeds aren’t shown, then it’s safe to assume that the card is showing the read speed.įind out more on these cards below. CFexpress cards often display the speed in MB/s, with some displaying both read (R) and write (W) speeds. The release of CFexpress 2.0 in 2019 introduced type A and type C cards, with type A being more compact, type C being larger, and the existing cards, type B sitting in the middle.
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*If in doubt, check your camera manual to see what card is best for your model The first cards introduced are physically the same size as XQD cards, with the same contacts*. You can use them in SD card slots with an adapter, but these are fiddly and not as reliable as a dedicated SD Card, but could be good for bargain hunters, if you want to save money.Ī 64GB MicroSD card with SD adapter will set you back around £8-16.ĬFexpress was introduced in 2016, and designed to give higher read and write speeds using technology standards that are already widely in use in computing technology. However, they don’t always offer as high speeds as UHS-II SD cards, and as they are small, they can be quite fiddly to use. MicroSD cards are used in some of the more compact cameras available, and due to them being used in numerous other devices such as Smartphones, Dashcams, and security cameras, they are often available for cheaper prices than SD cards. Samsung EVO select microSD card with adapter SD cards are up to 2GB, SDHC more than 2GB, and up to 32GB, SDXC above 32GB, and up to 2TB, beyond this there is SDUC, which is more than 2TB and up to 128TB. On some cards, both the read and write speeds are shown with the read speed shown with a small R, and the write speed shown with a small W. Many cards will display the MB/s (Megabytes per second) speed the card supports, however, it’s worth noting that this is often the maximum read speed, and it’s worth checking the maximum write speed the card offers. However, be aware that these are the maximum READ speeds, and write speeds are often slower.
It’s all well and good saying a memory card is 300x, but 300x what? A card that supports 45MB/s speeds, has 300x on it, and therefore the 300x is 300x 150KB/s. Just to confuse things further, some cards will display another speed rating on the front. The number is found in the middle of a capital U. U1 means the card has a minimum of 10MB/sec sequential write speed, whereas U3 means the card has a minimum of 30MB/sec sequential write speed. The UHS speed class, U1/U3 has been effectively replaced by Video speed class. These higher speeds will be particularly useful for high quality 4K and 8K video recording, and you should check what rating is needed by your camera if you plan on recording video. Video speed class, V30 supports a minimum of 30MB/sec sequential write, V60, 60MB/sec, and V90, 90MB/sec. Originally it was simple signified with a large C with a number in the middle, the “Speed class”, however, this was replaced after they reached Class 10. Unfortunately, there are multiple ways in which companies will tell you how quick an SD card is. SD Memory Card labelling explained SD Class and speed ratings explained…
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