First time poster. Sorry if this is already a topic somewhere (couldn't find it in any search).
I like to think there is a solution to most technical challenges--not always an elegant one--but I'm still scratching my head about this one:
Shooting yesterday the DP wanted to do a 120FPS shot on a slider from about 9" (ECU eyeballs) to 4' (medium shot). We framed up on a 32mm Zeiss Close Focus Prime.
I knew about it ahead of time, which was nice, and experimented with different calibration techniques to get the throw on the Preston to feel like a manageable pull.
What I didn't realize was the DP wanted the whole thing to happen in ~1.5 seconds. I quickly found out "on-the-day" that the motor simply couldn't catch up with the move. Ultimately we had to slow the move down to match the speed and throw of the lens.
Anybody know what we could have tried? If the motor is running at its max speed, there's nothing left to be done, right? I suppose an idler gear that could create a massive mechanical advantage between the motor and the lens could work, but it'd have to be custom and would probably introduce a whole range of new problems. It's really the only option though, right?
I suggested switching to a 50mm (non-CF) prime and trying to match the frame size and hopefully achieving less barrel throw, but we had space limitations and the DP was more committed to the 32mm look than the speed of the move.
Anyway, I wanted to toss this challenge to everyone and hopefully get some ideas for next time.