Creating Camera from Selected View or you can say Selected camera.
Source selViewCamera.mel and Run selViewCamera or Run selViewCamera in combination with ALT Hotekey to Frame the newly created camera by exisiting whose view you were already in. (eg. if you are in persp you will get persp1 new camera and pressing ALT will move your persp camera back to frame persp1 in center as selected)
Download Script Here