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somewhat overly simplified point of reference/reasoning.
weight- the avg difference in weight is 20%+ in favor of composite. what you can also get with that wgt reduction is a reduction in overall volume of the tripod in the same support class. support class including weight , rigidity and structural size.
stability- is a combination of factors. weight alone does not a stable tripod make. now we all carry just a little more with us in I favorite bags. the bag itself is relatively heavy and of the dead weight category. it generally does nothing while shooting. most modern tripods have...Show more →
I won't disagree that the carbon rods used in tripod are different from fishing rod, but to think that the tripod rods are the same or has the same properties and performance as those use in the aircraft industry, you are very wrong.
You work in the aircraft industry (I am just assuming) and should know that those materials are classified as non-exportable without US government approval, it can not only be use in the aircraft industry, it can also be use in the nuclear industry. We know what it can do or cannot do because we are also a low cost partner in the JSF F-35 program (We will buy it when it is ready and needed to replace our F-15SG one of the most advance eagles ever built other than the F-15K, but will not throw in money to the bottomless pit with years of cost overrun). My son is flying trainers that were also use by the US and European air forces that were totally built with composite skin to minimize radar signature and weight to conserve fuel.
No, they all flexes if it is hollow.
You should also know that the wings of the B787 Dreamliner also flexes like the wings of the bird, and the fleet of F-22 Raptors were grounded for a period of time due to cracks found on composite parts.
I don't think we need to go any further to prove how much one knows.
As for using the camera bag to weight down the tripod will not work with strong gust of wind, the stripe or string that one used to weight it down will vibrate like a guitar string bringing the vibration up to the camera.
On a windy night try taking a picture of the full moon and see what you can get.
The decision still goes with the one who spend their money, and that is why I never put in a conclusion or recommendation for what one should buy.
For me I have big ones, small one, long ones, short ones, light ones, heavy ones, curly legged one and single legged thing that we call monopods. There is no such thing as one size fits all type of tripod.