"Looking at the criteria, stability and anti-vibration qualities are of paramount importance. There's no point in buying a tripod that is not stable when shooting under adverse conditions in the field. This means the tripod should possess not only good stability when shooting with the longest lens you own (or are going to use) but should also have good damping qualities, so that any wind or ground generated vibration isn't passed on to the camera and that longer lenses won't vibrate excessively. If you choose well you should be able to take images in all but the most horrific weather conditions with ease."This is a very useful forum post from ClubSNAP about what to look for in a tripod, what sorts of issues to consider (height, weight, stability), etc. I have to admit that although I have a cheap tripod for my camera, I hardly ever use it. My big tripod investment last year was for a video tripod, which served me very well the first and only time I've used it so far. ;-)