BuckSkin wrote in post #19086405
.If not locking down the tripod, why use one at all ?
. .
With a high-end gimbal head, when the camera/lens is balanced properly, it is just as stable when it is "free" as it is when it is locked down. . Tightening the knobs does not make it any more stable because it is already rock solid even with the knobs left semi-snug.
For me, the reason not to lock it down is because of the need or desire to move the camera a little here and a little there to adjust the framing of a shot. . This often has to be done rapidly, and there is not enough time to be tightening and untightening knobs between shots.
For example, I am currently shooting a Bluebird nest cavity. . I have my big lens on the tripod and clamped to the Wimberley gimbal. . As I sit there for minutes on end, waiting for one of the adult Bluebirds to return to the nest, the lens will be pre-focused, and aimed in such a way so as to capture the Bluebird in flight as it approaches the nest tree. . I try to fire a short burst as it is in mid-air, right before it lands on the tree.
The instant it lands on the tree, then I want to very quickly move the camera a little bit, to get shots of the Bluebird while it is perched at the mouth of the hole, before it goes into the hole to give the food to the babies. . It only sits on the edge of the hole for a brief moment; sometimes less than one second. . So I have to be able to re-aim the lens, zoom it in closer, re-focus the camera, and fire off a shot or two in less than one second. . That is A LOT to do in less than a second! . If the tripod were locked down (a.k.a. the knobs tightened all the way), then I would have to loosen the knobs before I would be able to re-aim the lens. . There is just no time for that.
Another example would be when shooting mammal or bird portraits. . If a bird is perched on a branch, and turns its head to its right, then the photographer will typically want to have the bird on the right side of the frame, and have some nicely balanced negative space on the left of the frame. . The second that bird turns its head to the left, the photographer will want to instantly re-aim the camera, to compose the scene differently, so that the bird is on the left of the frame, with the negative space on the right side of the image. . Birds and mammals often turn their heads for only a brief moment; less than a second in many cases. . If the gimbal head were locked down, you wouldn't be able to re-compose the scene and fire off a shot every time the subject turned its head for a second. . That would absolutely suck.
Who wants to be stuck with an awkward composition with the bird in the center of the frame? . No! . You need to put the bird off-center, for the most pleasing composition. . And there is often just a second, or just a part of a second, in which to do this. . No time to be fiddling with knobs, or you miss the shot.
I guess I have the reverse question for you; if the tripod and gimbal head holds the camera and lens just as steady and solid when the knobs are loose as it does when they are tightened, then why would one ever tighten the knobs? . What advantage would that ever provide?
EDIT:
Below is a pic of my set-up at the Bluebird nest. The nest is in the charred, blackened stump on the left side of the frame. The shot below that is one that I got as the Bluebird approached its nest in flight, bringing a Dragonfly back to the hole for its young.
1/400 • f/2.2 • ISO 50
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© Tom Reichner [SHARE LINK] THIS IS A LOW QUALITY PREVIEW. Please log in to see the good quality stuff. For proponents of handholding big lenses (or even small lenses for that matter), then I have the following question:
If one knows precisely where a bird will be, but has no idea when the bird will fly through that area, and has to be ready to fire off a precisely aimed shot with just a split second's warning, then how in the world can you possibly focus on the bird and get the camera aimed so precisely in just a split second?
Or, is it actually possible that any of you can hold a 12 pound lens plus 3 pound camera up and aimed precisely for 10 or 20 minutes, without it shifting at all, as you await the bird's approach?
. That seems absolutely impossible to me!
. Personally, I cannot do that.
. And I don't think any other human can do it either.
. Eventually, at some point, the camera will shift a wee little bit to the right, or a wee bit down, or up .... and then your composition will be all messed up, and that to-the-very-inch precision that you worked so hard for will be lost.
When you have to have a lens aimed precisely at an exact spot for very long periods of time, while you wait for the brief instant when something will cross that zone, I don't think there is any way to do that successfully without a tripod, or some other means of holding the camera in place without needing to do it with your arms and hands.
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