Remote LiveView Control
Which camera system are you using ? If it's Canon, then you can use a wired Android tablet (requires a USB host port on the tablet) and a remote control app. called "DSLR Controller" ( http://dslrcontroller.com/ ).
I've used this with a 10" Asus Transformer TF101 tablet and my Canon 50D.
Check out my galleries (lots of macros) at :
|Orange-tip Butterfly by anisah|
from Nature's Colour Palette
|Windswept juniper by Kreber|
from Wind power