when you use non CPU lenses on a D90 do you have to tell the camera the focal length - if not don't you have to set the flash to manual using the menus?
On my old D50 I could only use a manual lens on manual flash and had to set the built in flash to manual. (That is all from memory as I don't use the D50 anymore - my wife has it and I can't check as she is currently on a plane with said camera)
D3 + 20mm f2.8 AFD + 85mm f1.8 AFD
Hunger pays a heavy price to the shining Gods of speed and steel