Using an iPhone in conjunction with a DSLR can have certain benefits. For instance, you can use Eye-Fi cards to send photos to your phone or transmit GPS information to the camera using Bluetooth. Thanks to the Flash-Dock, you will have an easier time combining your DSLR with your iPhone. Just to be clear, this does not connect your iPhone to your DSLR physically. But there are many things you can do over Bluetooth and WiFi. This dock holds your iPhone so you won’t have to worry about carrying it with your hand. It can be yours for $40.