Nikon D500 - Manual (Page 360)

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Notes on Optional Flash Units (Continued)
The SB-5000, SB-910, SB-900, SB-800, SB-700, SB-600, SB-500, and
SB-400 provide red-eye reduction, while the SB-5000, SB-910, SB-900,
SB-800, SB-700, SB-600, and SU-800 provide AF-assist illumination
with the following restrictions:
• SB-5000: AF-assist illumination is available when 24–135 mm AF lenses
are used with the focus points shown below.
24–49 mm 50–84 mm 85–135 mm
• SB-910 and SB-900: AF-assist illumination is available when 17–135 mm
AF lenses are used with the focus points shown below.
17–19 mm 20–135 mm
• SB-800, SB-600, and SU-800: AF-assist illumination is available when 24–
105 mm AF lenses are used with the focus points shown below.
24–34 mm 35–49 mm 50–105 mm
• SB-700: AF-assist illumination is available when 24–135 mm AF lenses
are used with the focus points shown below.
24–27 mm 28–135 mm
Depending on the lens used and scene recorded, the in-focus indicator
(
I) may be displayed when the subject is not in focus, or the camera
may be unable to focus and the shutter release will be disabled.