Originally posted by dadipentak Thanks for the comment, Ben--some questions:
1. Are you able to adjust the dampening of pan/tilt movement with any sort of precision? In my experience, it's pretty much "free movement" or "lock down" (and "lock-down" is kinda iffy.)
2) I imagine mounting the lens with the U inverted as an awkward and dicey proposition (I'm preternaturally clumsy, btw): you don't find it so?
3) Could you spell out the up/down thing for me for me? If I'm shooting up, mount the lens with the U inverted?
I try to make a useful answer:
1. dampening the horizontal axis can be done through tensioning both locking screws slightly up to the point, where you find it comfortable. For me and my lenses this works (500/4.5, sometimes with 1.4x tc and 300/2.8 sometimes with 2x tc) These locking screws stay put at any given tension and Manfrotto intended this use. But I imagine that a Wimberley or other high end gimbal will provide smoother action...
The vertical axis is more tedious to adjust... I don't know why, but Manfrotto hid the tensioning screw (a small Allen screw) below the rubber cap over the lock screw. You need an Allen tool to adjust horizontal tension. I am too lazy to adjust that for any different load and settled with the tension Manfrotto has pre adjusted. It is slightly too loose for my taste, but quite universal....
2. Inverted U mounting is indeed not easy. Fortunately Manfrotto's QR slide helps, as it is very massive and the plate slides nicely back and fro in it. You need to lock the U upwards, when trying to insert the lens. It is not easy and I use it only when really needed, which leads me to
3. Inverted U position is sensible for shooting really steeply skywards. So might be helpful for birding or airplanes. It can also be useful if you want to make distant macro shots with a long lens and extension tubes or a macro lens in place, when you have to aim steeply down (you remember the old Pentax 135-600, which came with a dedicated achromatic lens, for example). In both cases the inverted U gives you more clearance, before the lens colides with the base of the gimbal or the tripod shoulder.
For pure balancing I never found the inverted U necessary, as you have also the freedom to mount the moving U in different heights on the vertical axis. But this ofcourse lens dependent.
Ben