This adapter makes it possible to use, for example, cameras that require expensive CF card with SD cards. A fast CF card with 128 GB of storage costs about 600th Thanks to this adapter saves you a lot of money.
I can not notice any loss of speed in the use of this card with an Olympus E520.
The adapter works with a 64GB SD card (space for more than 2,800 photos in RAW + JPG).