A camera dolly is a great way to get smooth tracking shots, though retail versions can get quite expensive. Here's an inexpensive way that seats your tripod inside of a specially made dolly on a track instead of a platform that the camera, tripod and operator stand or sit on.
Stuff I use: https://www.amazon.com/shop/thefrugalfilmmaker
PARTS LIST
8x 3/4" PVC plugs
4x 3/4" PVC side outlet elbows
5x 3/4" PVC T-joints
1x 3/4" PVC pipe (10')
2x 2" PVC pipe (10')
Roller Derby Men's Cruisers or 8x skate wheels + bearings
http://www.walmart.com/ip/Roller-Derby-Men-s-Cruisers/17353227#rr
8x 5/16" bolts, 1.5" in length
8x 5/16" nuts
8x 5/16" washers
8x 5/16" lock washers
TOOLS USED
Dremel rotary tool on Dremel Workstation
Cordless drill w/ 1/4" & 5/16" drill bits
PVC Ratcheting Cutters (http://tinyurl.com/bseo2rk)
Drill press vise
Video recorded with a Canon VIXIA HFS100
Audio recorded on a Zoom H1 Handy Recorder, and a Radio Shack Clip on lav mic
Editing done on Sony Vegas Pro 10
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