Thor's been doing the same thing.
There's a fix you can download for it if you search google (not sure if I'm allowed to link it; just search for "ragnarok nameless camera fix" and it should be one of the first things to pop up; it's a text file that you drop into your game's "data" folder). It doesn't allow you to double click to reset the camera angles, but it DOES at least let you fix it manually and zoom out normally.
If it IS supposed to be zoomed in like that, I have to question the sanity of whoever designed it that way. @__@ How are you supposed to accomplish anything when your party members take up the entire visible area?