Guide number: 72 in feet at ISO 100 when used as accessory set at 35mm and 82 when used in combination with built-in speedlight on N65 or N80. Bounce capability: Flash head tilts up to 90 degrees or down to minus 18 degrees with clicks.
Flash exposure control: Following Modes are available: 3D Multi-Sensor Balanced Fill-Flash for D1: Includes 3D Multi-Sensor Balanced Fill-Flash for D1, Multi-Sensor Balanced Fill-Flash for D1, Center Weighted Fill-Flash for D1 or Standard TTL for D1; specific function employed depends on the lens in use
Automatic Balanced Fill-Flash with TTL Multi-Sensor: 3D Multi-Sensor Balanced Fill-Flash, Multi-Sensor
Balanced Fill-Flash, Matrix Balanced Fill-Flash, Center Weighted Fill-Flash/Spot Fill-Flash, Manual
Power Mode for F5, F100, N90s, N80 or N65
Flash Output Compensation: +3 EV to -3 EV in 1/3 EV steps. Wireless Control: Can be used off camera with TTL control to approx. 23 feet. Up to approx.140 feet in manual mode.
Slow and Rear Curtain Sync: Controlled from camera position. Camera sets exposure from 30 seconds to highest sync speed to balance.
Ready Light: Lights up when SB-50DX is charged and ready to fire, Blinks when flash fires at its maximum output, indicating light may have been insufficient (in TTL auto flash mode).
Wide Flash Adapter: Allows the SB-50DX to be used with lenses as wide as 14mm LCD Indications: 3D Multi-Sensor Balanced Fill-Flash, Matrix Balanced Fill-Flash, Flash Output Compensation, Flash Zoom Head Position, Audible Alert Warning, No AF-Illuminator, AM, Slave Function.
IR Filter: Supplied filter enables SB-50DX to be used as a remote commander. Light Sensor: Senses light received from the master flash unit in wireless multiple flash operation. Wireless Slave Flash Mode Effective Range Auto Slave Flash Approx. 23 feet Manual Slave Flash Approx. 130 feet. Power source: 2 - CR123 Lithium.