In blender, if you scale your camera in negative x so “-1” you get a flipped camera.
that’s it!, it’s that simple… sorry no more explanation than that.

Okay just to add an extra tip: if you want to do the exact same thing in Maya, it’s a bit more steps, first make your camera at 0,0,0 group it, now instead of moving rotating your camera use the group, if you scale your group in -1 on the x axis there you go…
Here’s the step by step demo:

Well yeah!, that’s easy!
Hope you enjoyed and learnt something, if there are any more tricks like this you know i’d be glad to hear them, follow me on twitter @lucianomunoz_