tripods for dslr jib

Weight of Jib (including the counterweights) + Weight of Camera (including any accessories) = Minimum Tripod Load Rating.

Then go to B&H's tripod section, and use the Supported Weight filter on the left (once you're in the tripod section of course).

B&H ships to the UK so you can go that route, or use the results to search Amazon UK.

OR you could get a surveyor's tripod and modify it for use with your jib. http://www.dvxuser.com/V6/showthread.php?133252-jib-crane-tripod
 
OldCorpse said:
Weight of Jib (including the counterweights) + Weight of Camera (including any accessories) = Minimum Tripod Load Rating.

Actually, that's not all.

You should account for leverage: "If you give me a lever long enough and a place to stand, I can move the world."

Be aware that any movement creates momentum, and the weight increases the faster the movement.
Click to expand...

I'm not sure I follow what you mean as the counterweights balance the jib, so there should be no issue with leverage. Momentum is always an issue of course, but it's an issue for the jib manufacturer (and the jib operator in terms of safely controlling the jib).

OP, here's a video on using a set of sticks you can find at big box hardware stores:

 
Old Corpse is saying that you need to account for the live load, not just the static load. Let's say your jib weights 30 lbs fully configured. When you crane up, you put a downward force on the back of the jib. This adds 'weight' to the tripod. The faster you crane up, the stronger the downward force will be on the tripod. It might add 10 or 20 lbs of additional force to the tripod. So when rating a tripod, if you have a 30 lb jib, you probably need something rated higher than 30 lbs.
 
Yes there's extra force but it's so small it's negligible. Having said that......

First, the tripod does not need to handle panning and tilting of the jib. All it needs to do is provide a base for the jib to mount to. The jib locks on the tripod and that connection point does not change.

So the tripod needs only to support the total weight of the jib, and it is the base of the jib which has to deal with changes from the jib's movement and momentum. I suppose if you're using a cheap jib that doesn't have it's own panning base, then the tripod head will have to deal with the panning. Either way, something needs to cope with the panning, so let's look at that.

A properly balanced jib will require almost no force to give it momentum, and should require almost no force to stop it. In fact, a hypothetical jib that has no friction in it's pan base or tilt axis, would require a force so small to generate momentum that you might not be able to measure it.

But since we don't have this perfect hypothetical jib, consider a merely good jib that's properly balanced. If you were to add a few ounces of weight to the counterweight end of the jib, the camera would start to tilt up. It takes very little force to get a jib moving, so little that it's negligible. Even a jib weighing hundreds of pounds. And throughout the properly balanced jib's movement, the relationship of that weight does not shift or change in relation to the tripod. All the weight still sits atop the tripod at the same point. If the weight did shift, it would mean two things: the jib isn't properly balanced; and the amount of force necessary to operate the jib would increase/decrease as the jib moved.

Essentially, although the "live load" of the camera moves, it moves with an equal and opposite live load - the counterweight. The net result is that the total mass (the jib) exerts the same amount of downward force (gravity) on the tripod regardless where the jib is moved, and the tiny amount of force applied to start and stop it's movement really is negligible.

From a pratical standpoint, would I get a tripod with a max load of 30lbs if I was going to mount a jib with a total weight of 29lbs? Absolutely not. I'd get one rated for at least 20-30% more than I expect to need. So perhaps the formula should add that:

(Weight of Jib including counterweight + Weight of Camera including accessories) x 1.3 = Minimum Recommended Tripod Load Rating

Anyway, as to the OP, I'm kind of curious as to which jib he's using.
 
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