
Originally Posted by
GrumpyDiver
Colin - that image is a great tribute to your Gitzo.
From a pure technical standpoint, I read a writeup by Gitzo USA's marketing manager extolling the production methods that Gitzo uses in their carbon fibre tripod manufacture. As marketing folks tend to do, they will spin anything into a positive attribute. In the article, he was comparing Gitzo's manufacturing techniques against those used by the Asian competitors. I wish I had copied down the link.
1. Gitzo uses a gravity fed casting technique to make the tripod main frame, versus the techniques used by others. I'm sorry, but gravity casting is the oldest, most low-tech, problematic way of casting any metal. Flow and cooling are problematic and can cause flaws like cracks or trapped bubbles as well as inconsistencies from piece to piece (warping, shrinkage, etc). High pressure casting techniques are far more precise, robust, and machined pieces are even stronger.
2. Gitzo uses pulltrusion to make its carbon fibre versus the manually rolled sheets used by the Asians. Pulltrusion is a very low cost technique that is used purely because hand layup techniques are more labour intensive. He points out that the hand layup techniques can have seam failures (which is true), but neglects to mention that one common problem of pulltrusion is consistency in the final product (positioning of the carbon fibre material within the resin), which can lead to uneven strength throughout the tube. Both work, when done properly, but I certainly would not suggest one production method is neccessarily going to result in a superiour product over the other.