To shoot photos that are sharp from foreground to infinity, you must focus at the "hyperfocal distance" for the lens and aperture you're using.

This 3.5" x 5.5" laminated card gives hyperfocal data for Digital SLR's with 1.5x or 1.6x chips (APS-C), such as the following:

• Canon D30, D60, 300D, 350D, 400D, 450D, 500D, 1000D, XT, XTi, XS, XSi, T1i, 10D, 20D, 30D, 40D, 50D, 7D
• Nikon D1, D1H, D1X, D2H, D2X, D2Hs, D2Xs, D40, D40x, D50, D60, D70, D70s, D80, D90, D100, D200, D300, D300S, D3000, D5000, D1, D1X, D2X, D2Xs, D1H, D2H, D2Hs
• Fujifilm S1, S2, S3, S5 Pro
• Konica Minolta 5D, 7D
• Pentax istD, istDS, istDL, istDS2, istDL2 K10D, K20D, K100D, K110D, K200D, K2000, K-m, K-7, K-X
• Sony A100, A200, A230, A300, A330, A350, A380, A500, A550, A700

• Lenses from 10mm - 85mm.
• Apertures from f/4 - f/22.
• Distances are given in feet.