Table 2 Depth of Field Data for EF17-40mm f/4L USM

Wide (at 17mm)	(m)
Focusing distance f/4 f/5.6 f/8 f/11 f/16 f/22 Near Far Near Far Near Far Near Far Near Far Near Far Infinity 2.29 Infinity 1.65 Infinity 1.2 Infinity 0.88 Infinity 0.65 Infinity 0.49 Infinity 1 0.75 1.59 0.68 2.15 0.6 4.48 0.53 Infinity 0.45 Infinity 0.38 Infinity 0.5 0.44 0.58 0.42 0.62 0.4 0.7 0.37 0.86 0.34 1.33 0.31 9.29 0.28 0.27 0.29 0.26 0.3 0.26 0.31 0.25 0.32 0.24 0.35 0.23 0.39

Tele (at 40mm)	(m)
Focusing distance f/4 f/5.6 f/8 f/11 f/16 f/22 Near Far Near Far Near Far Near Far Near Far Near Far Infinity 10.88 Infinity 7.72 Infinity 5.49 Infinity 3.91 Infinity 2.79 Infinity 2 Infinity 1 0.93 1.08 0.91 1.12 0.88 1.17 0.83 1.26 0.78 1.43 0.72 1.75 0.5 0.49 0.51 0.48 0.52 0.47 0.53 0.46 0.54 0.45 0.56 0.44 0.6 0.28 0.28 0.28 0.28 0.28 0.28 0.29 0.27 0.29 0.27 0.29 0.27 0.29