Orthographic perspective mode?

Is it possible to provide a “more orthographic mode” a bit more like the camera of Sarcraft 2, Anno 1800, Desperado III, or other modern 3D strategy games and allows players switching between old and new freely?

The angle of view of the original game is a bit too high causing some distortion at the corner of screen. It makes me somewhat difficult being used to playing some old 3D strategy games.