[hampers]

Originally Posted by postcardcv

yeah it's the arca QR plate for my gimbal, it has a block at one end which should help but it just won't lock tight. I'll have to have a look for a solution.

Gave the lens it's first test today as I went out for a walk with my wife and kids. I suspect I'm going to be pleased with it, it's definitely easier to take out on days like this and results with either 1.4x or 2x seem good. (I might have to try a mkIII 2x soon though)!

I've got a MkIII and am down in Norfolk middle of next month if you want to try it out for comparative we could meet up. If you pm me your email I'll send you some images taken with it on.

Cheers

Phil

[Roy C]

Peter, I have a Jobu surefoot lens plate which has a "Curved non-removable hard-stop prevents rotation of lenses" (quoted from Jobu website) With this plate there is no way that the plate will rotate. I can tell you from experience with the 300/2.8 that there is no way this plate will rotate providing you butt it up against the end of the tripod foot as required. What's more I never knew the screw to even un-tighten one iota (probably because rotation was impossible). I kept my plate on even when hand carrying with a BR strap, that way you could quickly go from hand carrying on the strap to mounting on a tripod without having to keep messing around with the lens plate.

[Roy C]

Originally Posted by Jaff

My Gimbal plate didn't have any way to stop it slipping either other than me tightening it every now and again when it had worked itself loose, as evidenced by the marks. I can't suggest anything I'm afraid, I just accepted it.

See my post above Adam, no need to 'just accept it' when there are solutions avaiable

BTW guys I am surprised that know one bothered to ask which lens plate I had after my first post - I guess that tells me what you think of my opinions lol

[postcardcv]

Thanks for the info Roy, I suspect I might have the same (well a very similar) plate as mine has a bit that butts up against the lens foot... But it still works loose, I suspect that there might be an issue with the screw so I'm going to try a new one when I can get hold of one. Out of interest do you still use yours Roy? If not I might be interested in buying it off you as I could do with another plate or two.

[postcardcv]

Originally Posted by hampers

I've got a MkIII and am down in Norfolk middle of next month if you want to try it out for comparative we could meet up. If you pm me your email I'll send you some images taken with it on.

Cheers

Phil

I did have a play with one in a shop today and the difference didn't seem huge, but meeting up and trying one in the field would be great.

[hampers]

Originally Posted by postcardcv

I did have a play with one in a shop today and the difference didn't seem huge, but meeting up and trying one in the field would be great.

Will pm details and number.

Cheers


Phil

[Roy C]

Originally Posted by postcardcv

Thanks for the info Roy, I suspect I might have the same (well a very similar) plate as mine has a bit that butts up against the lens foot... But it still works loose, I suspect that there might be an issue with the screw so I'm going to try a new one when I can get hold of one. Out of interest do you still use yours Roy? If not I might be interested in buying it off you as I could do with another plate or two.

Could be the same Peter, the lens plate flange has a concave profile that matches up with the convex profile of the 300/2.8 tripod foot, once butted together and the screw tightened it cannot rotate.

I still use mine sometimes with the BWG and 400/5.6 (big overkill but it saves me buying another set-up).

[a.dancy]

A little late I know but good luck with your new lens Peter.

I recently got the new Canon 2X converter MkIII. I am very pleased with it.

[postcardcv]

Originally Posted by Roy C

Could be the same Peter, the lens plate flange has a concave profile that matches up with the convex profile of the 300/2.8 tripod foot, once butted together and the screw tightened it cannot rotate.

I still use mine sometimes with the BWG and 400/5.6 (big overkill but it saves me buying another set-up).

Well it seems that the problem is with lack of friction between the plate and the foot. I tried a different screw and it didn't help at all... However I have now solved the problem by wrapping a couple of elastic bands round the foot. So a problem with a £500 head and a £3k lens was solved by a 2p elastic band!!!

[GYRob]

Originally Posted by postcardcv

Can any 300 f2.8 users suggest a way to get the QR plate to fix and not rotate? On my 500 there are two holes to screw the plate into which solves the problem.

Just use a bit of contac glue or double sided tape it adds a bit more friction and can soon be taken off if needed.
Rob.