Xsories WeyeFeye S

4 This is a Wi-Fi dongle that transfers images from your camera to your iOS device. It’s also the size of a matchbox, has its own battery and connects via USB to most brands of camera.

Hook your iOS device up to its 802.11n Wi-Fi, run the app and you’ll be able to view and save images – as will 19 other people, thanks to its web server.

Connection is instant and the allday battery will be useful for studio users, but the WeyeFeye doesn’t add much an EyeFi card or built-in Wi-Fi can’t do for occasional use. Ian Evenden

There are cheaper ways to put Wi-Fi in your camera. The WeyeFeye is rugged and fast but best suited to pro use.