Yes they do perform a heck lot of jobs and if you have the right camera for them they will absolutely make your shooting life as easy as possible.
Tablet as field monitor.
Nearly all external monitors sold in the market today cost an arm and a leg.
Flysight tablet 9 inch android wifi kids touch screen lcd monitor multi function fpv monitor with hdmi output compatible with dji phantom 3 4 inspire matrice and you can connect your portable dvd player professional camera raspberry pi zotac zbox pico xbox ps or fpv equipment via hdmi to use it as a screen for preview.
Unfortunately in most cases these tablet ports are actually for output rather than input.
It also means you don t have to wait for the horribly slow switching between liveview and hdmi output whenever you want to use the camera or magic lantern menus.
Get yourself an external monitor.
So these were the two methods by which you can double up your smartphone tablet as an external monitor to dslrs.
Use android and ipad as an external monitor.
I like that it allows you to use the tablet as an external field monitor while leaving the camera lcd fully operational for monitoring so that you can have two points of monitoring.
Yup it s financial in nature again.
How to turn your android tablet into a field monitor for dslr camera in this video i will show you how to turn your android tablet into a field monitor for d.
Some tablets like the amazon fire hd feature an hdmi port which might make you assume using your tablet as a monitor will be as simple as plugging in a cable.
If you prefer mobility then using canon s camera connect app is definitely a no brainer.