Who said 2-point was undistorted? Since this method ignores the z-axis vanishing point to reduce manual labor on hand-drawn perspective drawings, it is something of an anachronism in SU. 2-point perspective is actually more distorted than the standard full perspective view generated by SU. SU offers a 2-point view on the Camera menu, but it is a fixed view that reverts to full perspective as soon as you try to orbit.
The default Field of View is 35-degrees, I believe. That is pretty good for outdoor scenes; for indoors you may need a wider Field of View so you don’t end up staring at one small spot on the wall–maybe 50- or 60-degrees. In general, the lower the number the more the view resembles parallel projection; at 0 the two are essentially indistinguishable. At very high values, say 100-degrees or about, the view starts to resemble a fish-eye effect.
-Gully