Ik ben me aan het orienteren op een nieuw statief. Aangezien er hoogst waarschijnlijk ooit wel een zwaardere lens komt, moet komend statief voldoende zijn voor bijvoorbeeld een Sigma 120-300 of Canon 500mm f4 (jaja, lange termijnswerk
) hangt mijn keuze momenteel op Feisol CT3472 of de Gitzo 3541xls. Ik ben zeer te spreken over mijn Feisol monopod. Over de statieven kan ik echter geen recente recenties vinden, die zijn praktisch allemaal oud (ouder dan van de laatste 1-2 jaar). Van degene die ik heb gelezen zijn er naar mijn idee meer negatief, dan positief. Veel verhalen over feisol onderdelen die vervangen moesten worden, bijv de baseplate die uitsleet bij de lock-punten. Nu weet ik dat problemen eerder geneigd zijn op het net terecht te komen dan succesverhalen, maar toch zou ik het fijn vinden wat recente bevindingen te lezen. Volgens mij heeft hier echter niemand een Feisol (3471)?
In mijn zoektocht kwam ik volgend verhaal tegen. Weet iemand hier iets van? En dan doel ik met name op het eerste stuk, dat gaat over de 2 manieren van het maken van de poten. Echter heb ik in datzelfde topic een antwoord gelezen dat feisol ook 65% cf gebruikt. Ik besef dat komend verhaal aardig gitzo georienteerd is.
"Hi,
I don't think I would characterize my presence on NSN as "lurking", but I'll respond to the question about Gitzo vs. "Other Guys" regardless. There are three main tripod characteristics which warrant consideration that I'll examine here - Tubes, Locks, and Castings.
TUBES
The most important factor is the manufacturing process of the carbon fiber tubes. There are basically two designs for tripod tubes - roll table & pultrusion.
European tubes are made from the pultrusion process, whereas Far East tubes are made from roll table production. The differences are this:
Pultrusion tubes are cross-layered fibers, which are woven, seamless tubes made from a higher ratio of CF to epoxy resin than roll table - Gitzo tubes are 65% CF and 35% epoxy resin (bonding agent)
Roll table tubes are sheets of carbon fiber which are layered one on top of another with a layer of bonding agent between the sheets - the sheets are rolled, and then seamed.
Just as with a bag, or a shirt, anywhere there is a seam becomes a stress point which conducts shock and weakens tube strength. Additionally, because the sheets are layered upon one another, it takes more glue than pultrusion - it would be just as fair to call Far East CF tubes "Glue tubes" since they are made with 50% CF and 50% bonding agent. Also, air pockets are formed between the layers which cause weakness in deflection and damping.
LOCKS
The "G-Lock" system is not a gimmick - it's an engineering marvel that works extremely well for CF material. Gitzo G-Lock incorporates a cone shaped lock ramp which is nearly 5X the size of the previous lock ring that acts like a wedge, which amplifies locking power while reducing the torque necessary to engage the lock. The G-Lock is a simple, yet highly sophisticated design that speaks to the level of R&D at the Gitzo factory. Because the tripods are locking two CF tubes with a polymer ring (or wedge), the tolerances are very strict and the lock ramp needs to be very precise in order to maximize locking power - it is the reason that the Gitzo lock ring has alternating slits cut at precise angles - it makes the locking ramp act like "fingers" and spreads the surface contact area evenly around the full circumference of the tube.
Traditional lock rings like those found in previous versions of Gitzo tripods, and in most twist lock systems that have followed Gitzo's example, leave the connection between the tubes wanting. In other words, there are micro movements at the tube joints with non G-Lock tubes. These micro movements are amplified by the number of locking sections - thus 3 section tripods are more stable that 4 section tripods. Again, because of the strict tolerances associated with CF, adding or increasing the size of the lock rings, is not enough to improve performance. In fact, some companies have actually weakened there locking power by adding larger rings.
If Gitzo only increased the size of the ring, without forming the wedge and adding the alternating slits to it, it would not have improved performance. The fact is, the G-Lock is by far the most powerful, and easy-to-use twist lock mechanism on the market, requiring only a quarter-turn to lock and unlock the tripod leg sections. By eliminating micro movements between the leg joints, Gitzo has made the choice between 3 and 4 leg sections one of personal preference rather than performance since there is no difference between them in terms of strength or stability.
CASTINGS
All of the Gitzo tripod upper castings are made from gravity fed (or poured) castings, rather than pressure castings. Gravity-fed castings eliminate the possibility of air pockets that can get into castings when material is injected at high pressure. Gravity fed castings are stronger and longer lasting than pressure castings and can withstand a greater amount of torque. The torsion rigidity of the Gitzo upper casting (when combined with G-Lock) make the Gitzo tripod the tripod of choice for long lens shooters."
bron
Basicly, wil ik vooral weten hoe de kwaliteit van Feisol momenteel is (en tov Gitzo), en of die bijvoorbeeld de laatste jaren veranderingen hebben doorgevoerd in hun productie. Verder vooral uit nieuwsgierigheid of de productiemanier hierboven beschreven inderdaad zoveel uit zou maken als die persoon doet beweren.
Het groot(st)e nadeel van de Gitzo vind ik de opgevouwen lengte van 70cm
Is er verder een reden waarom ik voor de Feisol zou kiezen?
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Voor 3% gewijzigd door
douPel op 20-11-2012 16:38
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) en dan schieten we alleen op de horizon, zodra je omhoog gaat schieten, wordt het gewoon belabberd. Dát is het grootste nadeel van de Feisol en een van de redenen dat ik verder ging kijken. Ik wil geen middenkolom namelijk.
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), waarom dan toch €300 extra er tegenaan smijten?
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