Trackcharlie From United Kingdom, joined Apr 2008, 76 posts, RR: 0 Reply 2, posted (4 years 10 months 2 weeks 1 day 1 hour ago) and read 2659 times:
Having owned this camera and tried the same I would guess that you are out of focus. You do not mention which lens you are using. I used to have a 70-300 f4-5.5 IS and when shooting into the sky the autofocus would hunt like mad. Try selecting the centre spot as the autofocus point to achieve focus then recompose your shot.
Also try dioptre (spelling?) adjustment (the little wheel on the viewfinder).
Failing that can you digress on "nothing comes out".