I've got several aluminum tripods and have thought about purchasing a carbon fiber or wood tripod for landscape photography (with a Pentax 67).
Searching the Web has provided many conflicting statements about which type and model tripod is the best. I've really found no experimental tests which I consider convincing. What I've done in the past has involved photographing USAF lens test charts (center and corners captured in each frame), and comparing them under the following conditions:
Tripod model, tripod head, shutter speed, lens (focal length), MLU, leg extension and angle, suspension of weights (e.g. camera bag) or bean gag, and ground type (solid like concrete or soft like a meadow).
Tests I've recently done with a laser attached to the lens barrel aimed at a wall (with a USAF lens test chart) 15 to 30 ft away are not accurate enough.
According to the book "Image Clarity - High Resolution Photography" by John Williams desirable tripod characteristics include: "strength, stability (related to both mass and structure), and rigidity". In my opinion the situation is complex and involves coupling between the camera body and the tripod, dampening, rotational and translational oscillations, etc. Information which is not so easy to come by let alone evaluate.
Before I spend any more money ($500 to $700 Gitzo or Induro Carbon Fiber for medium format gear) I need to be convinced. Saving a few pounds of weight in the hope (or hype, not proof) that a particular tripod is better than what I've got makes no sense to me.
Does anyone know of any rigorous comparisons?
If not, it seems I will need to go the rental route, use the Norman Koren lens test (Imatest) system, and come to my own conclusions.
Ken