The 9351B here is a prototype model from Giottos' new range. We tested it with Giottos MH7001 ball head.
It's quite compact when folded, but opens out to a good height. The centre column is released via a locking knob, and the vertical movement is nice and smooth.
If you pull it all the way up, the column actually comes out altogether, revealing this tripod's special trick. A second locking knob lets you adjust the angle of the column clamp, so you can rotate it slightly, re-insert the column and use it as a boom.
You can do this with several rival tripods, but where they only allow a horizontal boom, the adjustable clamp angle on the Giottos gives you more than 90 degrees of movement.
It has much more versatility in this mode and, thanks to a Head Rotate Control, it's easy to rotate the column/boom to point in any direction.