Hello jharrison,
I never used interval shot with the F-900, butI found this in a manual, enter in the maintenance menu, page 8 VTR setup page, 1 frame rec ,and turn to on.
When you press rec, the camera will rec only one frame, but all the tape must be record with Bars before use this intervalometer
I haven´t use this intervalometer, so please check it before the shooting day
please send me an email if it works or not
bye