My guess is there is either a computer controlled movement device or they do it in post (depending upon the budget).

If you zoom in just slightly in post production you'll get extra footage out of frame. Set your movement points and time so that the pan goes from the far left to far right side of the frame and you've got a super-slow pan.

RJSchwarz
San Diego, CA

Hey Duelish, Herr Schwarz makes a good point for attaining good results in edit. To add to his point; however, If you are looking for perspective shift (off say a foreground object or perhaps for an architecturally rich shot) you are most definately looking at either motion control and/or a really good grip and a dolly (depending, of course an what you are looking for in a given move). Run searches on camera moves and shots with regards to "creeping", "crabbing" and "tracking" to avail yourself of what it is you want exactly. You may also be looking for "pedestal moves", as your query is a bit broad. You also may be refering to a "short creep" (or "mikey rooney" for the L.A. set) which is routinely utilised at the top of master shots to lend to a greater feeling of space to the shot when establishing the scene and is often used in conjunction with some cleaver transition (like a cutting off a foreground wipe from a BG player that counters the camera move off the top). There are all manner of ways to move a camera, if you can be very specific, I will be happy give you an exact answer as to how to acheive what you want for your shot. A good book to get you talking terms is "film directing, shot by shot" by Steven Katz, which I think sells for about 30 canuck bucks (been a while since I lived there, so don't quote me). It doesn't get very technical but it will certainly get you started.

Off topic but, FeckinMonkeyAD, welcome to the board.

RJSchwarz
San Diego, CA

Hey FeckinMonkeyAD, are you Canadian or just lived there? I'm in Toronto. The Toronto set calls that particular dolly move a Mickey Rooney too...