198lFV LockThis feature is used to lock flash output, allowing photographs tobe recomposed without changing the flash level and ensuring thatflash output is appropriate to the subject even when the subject isnot positioned in the center of the frame. Flash output is adjustedautomatically for any changes in ISO sensitivity and aperture. FVlock is available with CLS compatible flash units only.To use FV lock:1 Assign FV lock to the Fn button.Select [FV lock] for Custom Setting f4([Assign FUNC. button] > [FUNC. buttonpress], pg. 333).2 Attach a CLS-compatible flash unit.Mount an SB-900, SB-800, SB-600, SB-400, or SU-800 on thecamera accessory shoe.3 Set the flash unit to TTL or AA mode.Turn the flash unit on and set the flash mode to TTL or AA. Seethe Speedlight instruction manual for details.
