The Solid Rocket Boosters (SRB) have ignited and Atlantis is off the pad, note the glare from the SRB on the right (Time 38 secs).

Atlantis is well clear of the pad and is rotating to the correct orientation so it can rendezvous with Hubble. Note the brightness of the SRB plume and the pad at the  bottom of the photograph hidden by that wall of steam and smoke) (Time 44 secs).

Atlantis continuing to climb out (Time 52 secs).

Atlantis continuing to climb out (Time 66 secs).

Atlantis now very high, just compare the size of the Shuttle in the various pictures (Time 88 secs).

A last view of Atlantis, the SRB are separating (the two reddish items) and the Shuttle continues to climb using the Main Engines (the bright white spot) (Time 152 secs).

And the now empty LC39A.