I have an iPad 3 and I have a canon 5d iii, which can use SD & CF cards. I have a SD Card reader, which I use all the time with other cameras, but I needed a CF card reader. This works well, even though I get a message on the screen informing me that it is not an Apple approved device. It works and I would happily recommend it to other people. It gets 4 stars due to price. A SD card reader is only £3, but the CF card reader is £11. Why so much difference?