Hey guys, I hate to say this, especially since I read along more than I contribute, but I disagree.

ImpFighter is right. If you watch the clip in motion, it becomes very clear Darth Vader walks off the steps, takes one single step (ONE!) in between, and then moves on to the platform.
So there's no way the platform could have been that far away from his chamber, and the wide shot indeed should have shown a step or two.
If they truly are out of frame, and that's for ady to decide, then Ziz is right and I leave it at that. But if they aren't, then it should be showing.

I'm at work right now, so don't have time to brighten the picture or anything like that, but I hope it is clear enough as it is.