You might be interested in this. The Light-Field camera captures rays of light without focusing them. You focuse the picture
after you have taken it, when you look at it.
You can focus the picures at any point you like. Look at the first picture, if you click on the first insect then it will be in focus, but if you click on the second insect it will change focus to that. Hold and drag and you can change perspective!!!
https://www.lytro.com/camera
http://en.wikipedia.org/wiki/Light-field_camera
these cameras actually don't cost too much, considdering it is new technology.