Whatever you get, make sure you can adjust the height of the lens. Otherwise it's impossible to get everything balanced. The 393, as far as I can recall, does not allow fine adjustment of the height. That means you're likely to have the pivot axis of the lens well below the centre of gravity, like this image here. As soon as this lens is tilted there will be a torque that will act to rotate the lens back to the horizontal. You'll need to add friction to hold the lens in place.
With a proper gimbal, properly adjusted, the pivot axis will pass through the centre of gravity. You can tilt the lens to any position and it will stay there with no added friction. You can move the lens in any direction - up, down, left, right - with just the lightest touch. Here's a well-centred gimbal LINK
that's interesting Frank ....... so it should stay in position no matter what angle it is at - even when the locking screw is loose ............ am i correct in my understanding as I cannot see how that can happen ...... must have a go tomorrow
The 393 comes with the long 357PLV sliding plate.
It locks into the `gimbal` by tightening a levered screw on the side & extra security is by means of a spring loaded pin to stop your lens sliding out, but because you can slide it forward or backward before locking it off, you can balance it for centre of gravity.
You can balance it in one direction. Without an up/down adjustment you can't balance it properly.
Frank, I understand the centre of gravity & the axis of rotation, but as Rob said `Some gimbals don't need to be raised to get the same type of effect simply by adding a little friction in the first place, they will still move freely and stay in position too.`
eg the pic above of the 393, I find it balances no probs.
I would just like say thank you all for the advice and input. Its a gimbal mine field I have looked at all aspects and it all boils down to budget as it dose. I think iv decided on this http://www.ebay.co.uk/itm/111499683549?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT Please let me know what you all think
That really does look very nice.