Is it the case that it is simply the heavier the better, or does the rigidity of carbon fiber make up for some of the mass loss?
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From my reading, the rigidity has a lot to do with the diameter of the carbon fiber tubes. This concept is "in line" with high-end bike frames; using large diameter, thin walled CF tubes for reduced weight and increased rigidity. I am still surprised at the mental "disconnect" from the visual appearance of the large diameter legs and the actual weight. As far as mass and wind resistance, I would prefer to add weight at point of use when needed rather than carry the extra weight, whether it is needed or not.
Negatives of RRS vs. Gitzo:
1) cost, however, in the big picture $225 USD over many years of use is not a major factor...Also, if you carry you tripod with camera attached, the $65 additional cost for a safety plate is probably a good idea.
2) RRS max height 58", not an issue with the 203 FE
3)no track record compared to many years for Gitzo
4)Six week back order
Positives:
1)typical RRS quality with CNC machined metal parts vs cast mag.
2)"fool proof" top plate fixation system
3)Very rigid vs weight
4)And most important, IMO, looks better than the Gitzo. :~)
I am now trying to resist the temptation of the Cube on the RRS.
Steve