I bought this head after intensive research for use with my many medium format Pentax cameras.
At first I thought it was great ,set up with Pentax 6x7 and 600mm lens ,locked up tight and did every thing it should .
Due to the difficulty in getting film ,and getting it processed in Australia I put the tripod and head away for a few years .
Finally Pentax came good with a Pentax 645D and I could use all my big lenses again , imagine my horror and disgust when pulling the super head out and discovering that it would no longer lock up.
I contacted the supplier who told me even though it had had minimal use it was out of warranty,
he would give me a discount on buying another one (as IF) .
A local supplier Importer didn't like the fact that I said I was pissed off with Manfrotto and would not even look at it because I didn't purchase the head off him.
Now I am in contact with the Australian importer who has one pulled to pieces on his work bench and is awaiting manfrotto's reply as to why it has failed ?every thing inside he said looks to be in order .
Over $400 in Australia
Wouldn't touch with a 40 foot pole
The Hydrostat is the most advanced ball head, designed to meet the demands of professional photographers for a lightweight, but at the same time heavy duty load capacity head. The 468MGRC5 has similar features to the standard range of ball and socket heads, with independent pan and tilt locks, 360° pan and +90° / -90° tilt movement - but employs a revolutionary friction and locking mechanism. An inner oil chamber is compressed by turning the locking knob, exerting even pressure on the whole of the underside of the ball, which ensures sturdier locking and higher capacity... for camera and lens loads of up to 10kg. This head has a magnesium die cast body, a 2" Teflon coated aluminum ball which combined with specially designed tension surfaces provides movement as smooth as silk. A calibrated adjustable tension control allows you to preset the ball tension to suit your camera weight and give you fingertip control. The oversized lock knob is easier and quicker to find and turn. The second benefit of the liquid-based locking mechanism is that it all but eliminates unwanted movement during the locking phase.