Nikon R1C1 Wireless Close-Up Speedlight System Users Manual - English - Page 119
Auto Aperture AA flash mode
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Auto Aperture (AA) flash mode The SU-800's built-in sensor measures the flash illumination reflected from the subject and controls the flash output in combination with data automatically transmitted from the camera and lens to the SU-800, including the ISO sensitivity value and exposure compensation value as well as the aperture and focal length of the lens. • Auto Aperture flash is available only when the SB-910, SB-900 or SB-800 is used as a remote flash unit. (A warning indicator appears if the SB-R200, SB-700 or SB-600 receives an Auto Aperture flash mode signal.) • If the flash mode is set to Auto Aperture flash while a non-CPU lens is mounted, the AA mode display blinks as a warning, and the flash units will not fire. • For flash shooting distance range in the Auto Aperture flash mode, read the user's manual of your Speedlight. v Notes on performing flash operation in the Auto Aperture flash mode When taking a distant subject, underexposure may occur even though the subject is within the flash shooting distance range. Use of the TTL auto mode is recommended with cameras compatible with TTL auto flash. 119 z Reference information