i get 0.5 and 1.5 for minfov and maxfov, those are about 30 and 75 degree in horizontal direction. but i want larger range.
Have a look here: http://www.jpct.net/doc/com/threed/jpct/Camera.html#setFOVLimits(float, float) (http://www.jpct.net/doc/com/threed/jpct/Camera.html#setFOVLimits(float,%20float))
...and don't ask yourself, why this setting exists in the first place. Let's just say for 'historical reasons'.