So I was all keen to get down to the bay at 5:30 am and take some sunrise shots.

After reading lots of pages aperture, f-stops, shutter speeds, and white balance I figured I had a vague idea of what to do.

Camera: Nikon D90
Lens: Nikon AF Nikkor 20mm f/2.8 (no filter)

Settings:
camera body on M
shooting mode dial on M
Lens f-stop @ 2.8
ISO @ 200
White balance @ 2500 k
shutter speed @ 2 seconds


and what happens ?

r33 flashes in the bottom of the view finder and the camera won't take a shot.
(also, the flash button when pressed didn't bring up the flash)

So I set the body, and shooting dial, to "auto" and everything works fine.


So what did I do wrong? (besides getting out of bed @ 5 am :P )