Nikon D800 User Manual (en)

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The SB-910, SB-900, SB-800, SB-700, SB-600, and SB-400 provide red-eye 
reduction, while the SB-910, SB-900, SB-800, SB-700, SB-600, and SU-800 
provide AF-assist illumination with the following restrictions:
• SB-910 and SB-900: AF-assist 
illumination is available with 17–
135 mm AF lenses, however, 
autofocus is available only with 
the focus points shown at right.
• SB-800, SB-600, and SU-800: AF-assist 
illumination is available with 24–
105 mm AF lenses, however, 
autofocus is available only with 
the focus points shown at right.
• SB-700: AF-assist illumination is 
available with 24–135 mm AF 
lenses, however, autofocus is 
available only with the focus 
points shown at right.
In exposure mode e, the maximum aperture (minimum f-number) is 
limited according to ISO sensitivity, as shown below:
Maximum aperture at ISO equivalent of:
100
200
400
800
1600
3200
6400
4
5
5.6
7.1
8
10
11
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.
17–19 mm 20–105 mm 106–135 mm
24–34 mm 35–49 mm 50–105 mm
24–27 mm 28–135 mm