Re: Tripod for Spotting Scope
Wow, nice setup there Scott!
In general, stability and light weight are conflicting goals when it comes to tripods. Everything about optical performace depends on support, stable platform = good image.
If weight is a factor, I would suggest you pick which one is more important to you before you even set your budget (weight vs. stability). But even then, like so many other choices with equipment, you are striving for a balance between cost, performance and features. Features can actually end up dictating whether you even drag equipment out or make do without it, if it's not user friendly.
I've seen mediocre tripods (good wooden survey ones way past their prime) made to be very stable (at a very low cost) simply by draping a large chunk of chain through the legs. So you can get good performance with cheap tripods if add weight and treat them with great care and handling. If usability is important and you can spend a couple hundred clams, you can be much more choosey about what you look for and settle on.
It's probably just me, but I tend to err on the side of over analyzing almost everything, depending on who you ask!