Tracking Sports Actions the right way

Last weekend I had the pleasure to film a climbing competition for Ruppen Productions and Swiss Climbing TV. This meant a lot of tracking shot (Following the subject along a movement path by rotating the camera on a tripod). Here are my tricks for tracking sports actions the right way:

Tolerances

When mounting (rigging) a camera, there will always be non-permanent connection points. You attach a tripod plate to the camera with a screw. You then attach that plate to the tripod head with another screwing mechanism. A third screw connects the tripod head to the tripod. 6-9 connectors hold the legs of the tripod in positions.

All those connection points have tolerances, meaning they don’t fit perfectly together but have a bit of empty space between them (Illustration).

1) Resting Position, Force is required to get the pink cart rolling. Because of tolerances, there is no force on the blue cart yet. 2) The connection between pink and blue is engaged, there is suddenly more pulling force required, resulting in a jerking motion (not smooth). 3) After a while, the required pulling force evens out, the ride is smooth again.

When filming, those tolerances lead to choppy, jerky footage. My solution to this: I apply force on both sides of the tripod. This preloads the tripod head with force and eliminates some of that starting jitter.

Applying forces to both sides of the rotation can help the mechanism “settle” into the tolerances, giving you less delays and jitters.

Plan out the full movement set

Before I track action with my camera, I like to play out the motion beforehand, do a practice dry-run. This can show you your limitation in speed and range of motion. In the case of yesterday, the tripod head was only able to tilt upwards a certain amount until hitting a metal plate.

The solution was a very funky way of levelling the whole tripod head by tilting it backwards. This extends the vertical range for the tilt by about 50%, but made any horizontal camera moves impossible because of the angle. Those tradeoffs are the reason why every shooting situation requires some level of creativity. For a situation like climbing, where the only movement is vertical, it was a perfect hack.

Camera rig doing the famous “Smooth Criminal” lean by Michael Jackson

Safety zones

Just as in real life, in filmmaking it’s considered bad practice to hack off limbs. Unless it’s a real closeup, the border of the image shouldn’t cut through the extremities of the athletes. Using a safety zone (empty space) around the athlete and framing the shot a bit wider gives you more reaction time towards sudden movements.

A bad (cropped) shot to illustrate. The left foot is cut off, leaving out important information about the performance. The sudden action of shaking the right arm is also lost because the shot is too tight and has no safety zones

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