Nikon 25446B D90 User's Manual - Page 286

Aperture, Sensitivity, and Flash Range Flash range varies with sensitivity (ISO equivalency) and aperture. Aperture at ISO equivalent of Range 200 400 800 1600 3200 m ft. 1.4 2 2.8 4 5.6 1.0-8.5 3ft. 3in.-27ft. 11in. 2 2.8 4 5.6 8 0.7-6.1 2ft. 4in.-20ft. 2.8 4 5.6 8 11 0.6-4.2 2ft.-13ft. 9in. 4 5.6 8 11 16 0.6-3.0 2ft.-9ft. 10in. 5.6 8 11 16 22 0.6-2.1 2ft.-6ft. 11in. 8 11 16 22 32 0.6-1.5 2ft.-4ft. 11in. 11 16 22 32 - 0.6-1.1 2ft.-3ft. 7in. 16 22 32 - - 0.6-0.8 2ft.-2ft. 7in. In the following modes, the maximum aperture (minimum f-number) is limited according to ISO sensitivity when the built-in flash is used: Maximum aperture at ISO sensitivity of Mode 200 400 800 1600 3200 P, i, k, o 2.8 3.3 4 4.8 5.6 n 5.6 6.7 8 9.5 11 For each one-step increase in sensitivity (e.g., from 200 to 400), aperture is stopped down by half an f/-stop. If the maximum aperture of the lens is smaller than given above, the maximum value for aperture will be the maximum aperture of the lens. n 266