Lexar Professional 600x SDHC UHS-I Card review
Lexar's 32GB SDHC card is a Class 10 UHS-1 model, making it one of the fastest-rated memory cards you can buy.
In our file transfer test, which consists of writing a gigabyte of JPEG images onto the memory card using a USB3 card reader then reading them back onto a PC, the Lexar card wrote files at 32.8MB/s and read them at 58.3MB/s. This makes it even quicker than the Sony SF-16UX, which is also a Class 10 card.
Part of the reason to buy a high-speed SD card is for shooting in a camera's continuous mode; if a card is too slow it will slow down your shooting speed as previous frames are saved to the SD card from the camera's buffer. With our test Nikon D40 and the Lexar card, we could shoot seven frames in RAW mode before the camera had to slow down shooting. With Sony's card we could only shoot five frames before the SD card's speed became a bottleneck.
Lexar's Professional 600x SDHC UHS-I is a very quick SDHC card. It's expensive, though, so unless you're serious about using your SLR in continuous mode you're better off with Sony's SF-16UX (which is also only £66 for the 32GB SF-32UX version).
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