We had a flash back scene to shoot that the director wanted to use infra red film. We had the pressure plate modified for the thickness difference from the chosen stock on the platinum (the B camera). At that time the plate was modified, there were no shots requiring steadicam to be in infrared. On that cold (10-15 degrees) and damp night, it was decided to shoot a steadicam shot at a base 6 frames per second with a portrait lens, and random speed changes at chosen times.
The location was an old concrete plant roughly three acres in size with a 60 foot shear shale wall on one side. The talent was in a pick up truck roughly 20 foot from the base of the wall in the center of the enormous space. This allowed the shot to arc in wide passes and aproach the driver from long distances. Because of the slow speed I was concerned with steadiness when it was projected at normal speed so.. on went the gyros (k-4's). My preston sysytem was not one that could do the required speed change so...on went the fitzac ( with the required motors). The only interface ( in resonable time) for the Master to panavision mount ( fx later made up a wonderful piece for me) was the auto base (not light).
Realizing that 6 frames a second is 4 times slower than normal speed, I was in for a llllonnng continuos take with quite alot of additional weight.
I think we did four passes, each pass was roughly four minutes requiring continuous usable footage. If it weren't for a long time friend and Grip who literally held me up for the eternal lock off at the end of each pass, I would have collapsed in embarrassment and shame.
The reward was seeing the entire shot in the theatre, although cut up a little for suspence and intrigue ( we all need that in our movies).
I don't really know the full weight, but I suspect someone will figure it out.
My master arm was at its max setting and I had to use some surgical tubing wrapped around the bones on the upper arm to give a little more support.
Thanks for reading...
Buzz