Whenever I'm in low light or its night time my D300 has trouble focusing. The little AF assist light that normally comes on is not showing up to provide any light. Does anyone know if there is a setting i missed with that turned this off? EDIT: In the menu, my AF settings are as follows a1: shutter a2: focus a3: 9 point a4: normal a5: on a6: on a7: off a8: AF51 a9: on <---i figured this was the control for what I'm trying to do. a10: AF-ON EDIT: Still doesn't work, even in AF-S mode.