Nikon D500 Users Manual - English for customers in Asia Oceania the Middle Eas - Page 231

FV Lock This feature is used to lock flash output, allowing photographs to be recomposed without changing the flash level and ensuring that flash output is appropriate to the subject even when the subject is not positioned in the center of the frame. Flash output is adjusted automatically for any changes in ISO sensitivity and aperture. FV lock is available with CLS compatible flash units only (0 326, 328). To use FV lock: 1 Assign FV lock to a camera control. Assign FV lock to a control using Custom Setting f1 (Custom control assignment, 0 301). 2 Attach a CLS-compatible flash unit. Mount a CLS-compatible flash unit (0 326) on the camera accessory shoe. 3 Set the flash unit to the appropriate mode. Turn the flash unit on and set the flash mode to TTL, monitor pre-flash qA, or monitor pre-flash A. See the documentation provided with the flash unit for details. 4 Focus. Position the subject in the center of the frame and press the shutter-release button halfway to focus. 205