Inertia and Weight Distribution
Posted 30 July 2009 - 01:09 AM
As most of us know the distance between the monitor and rear battery module dictates how much inertia feedback you receive from the rig. The monitor further forward and the batteries further back creates a greater distance between the two and thus more inertia and stability. The monitor and batteries tighter to the sled creates less inertia and thus a more maneuverable rig with a smaller footprint. Personally I've found I prefer a tighter setup to create a more agile rig which must be handled with a lighter touch. When I spread the bottom weights too far apart I find I have to muscle the rig that much for control, especially through tricky moves. However, if I'm flying a very long camera, like an F900 with zoom lens and rear mounted battery, I spread my monitor and batteries further apart to better match the greater camera inertia I have on the top stage.
I had a conversation once with a veteran operator who told me "I'll take as much inertia as I can get", and this got me thinking. I know that not all rigs have this kind of adjustability, but for the ones that do, I'd love to hear some thoughts on this subject. Do you prefer more or less inertia? Do you adjust it per camera or style of shooting or do you leave it fixed at all times? How much inertia is too much?
Thanks for your input,
Posted 30 July 2009 - 01:47 AM
I have used one of Greg Bubb's extendable monitor brackets since about 2000 to push my TB-6 as far out as possible for more inertia as well as easier viewing. I recently got one of the tiltable Sachtler monitor arms to lower the monitor a bit as well -- this really helps with lighter monitors (Jens wrote about this bracket last year).
I fly a Pro1 sled, so my normal set up has all three batteries almost all the way back (that's 7 lbs of batteries behind the post) and the TB-6 about 6 inches in front of the post. Some don't like a really long sled but to each his/her own.
Posted 30 July 2009 - 07:22 AM
I like a lot of pan inertia too, that's why I love the new Accessory Balace Weighs system http://www.steadicam...showtopic=10286
But when working with a long camera, the pan inertia is already there. I don't understand your need to 'match' it below.
All the best,
Posted 30 July 2009 - 10:51 AM
Posted 30 July 2009 - 12:27 PM
Posted 30 July 2009 - 09:23 PM