Rendering - Introduction to AutoCAD 2011: 2D and 3D Design - page 323

2. Changing the lens to different lens lengths can make appreciable
differences to the scene. One rendering of the same room scene taken
with a lens of 55 mm is shown in Fig. 15.50 and another with a 100 mm
lens is shown in Fig. 15.51 .
Fig. 15.50 The rendering of the scene taken with a 55 mm lens
Fig. 15.51 The rendering of a scene taken with a 100 mm lens camera