Arca Swiss Z1 mount

I just received my Arca Swiss Z1 dp and I think it should work out well on my Manfrotto 055CXPro3. I noticed that the mount has two pins and also a groove as shown in the attached photo. Any idea what they are for? Thanks!

not sure what the goove is, but the pins are probably the same as the set screws in other heads, which stop the plate attached to the camera from sliding out if you loosen the clamp/know enough to move the camera but not take it out.

I'm using a Kirk 5D3 L-plate and the bottom of the plate is flat. So, I guess the stopper pins were designed for other types of plate.

The safety stops at the front & back of the Wimberley P40 plate prohibit your lens from accidentally slipping out of the quick release adapter(easily removed with supplied hex wrench if desired).
That's a quote from the B&H website when describing the above plate.

Does Wimberley have a plate for 70-200 lens?

you can use the p30, or even the p40, which is a tad longer than the foot of the tripod mount on the lens.

MDJAK wrote in post #14754007
you can use the p30, or even the p40, which is a tad longer than the foot of the tripod mount on the lens.

What would be the advantage of using the p30 or p40 compared to the p20 (which was specified for the 70-200 f2.8 IS)? Thanks

MDJAK wrote in post #14751693
The safety stops at the front & back of the Wimberley P40 plate prohibit your lens from accidentally slipping out of the quick release adapter(easily removed with supplied hex wrench if desired).
That's a quote from the B&H website when describing the above plate.

That's an accurate description for the Wimberley plate but those safety stops won't work in this Arca-Swiss clamp. The top jaw in the Arca-Swiss double-decker clamp has the regular Arca-Swiss dimensions and angles that we all use, the bottom jaw is a new proprietary clamp and plate system which may be their SlideFix, I'm not sure. I'll bet that the groove and two pins are for this new system, which hasn't taken off a year or two after release.

What people immediately noticed was that the new clamps are useless for ordinary Arca-Swiss type plates because the top jaws lift the plate above the top surface of the clamp so any safety mechanism doesn't work. When I bought my Z1 I bought the basic model with the round base and took that off and installed a proper Arca-Swiss type of clamp. There's a great picture on the Wimberley compatibility page that shows the problem clearly. Scroll down to the bottom of the page and look at Fig.3, you can clearly see the plate and its stop screw lifted above the clamp's top surface.

Perhaps the stopper bolt head might hit the pin? The bolt head and pin height could be adjusted if necessary. I've ordered some Kimberley plates so I'll find out soon.

Are the stop pins spring loaded or fixed? If they are fixed, I would just remove them if you want to use the clamp with all plates.

Fixed

The pins are indeed for our new Monoball Fix system plates. These plates are more compact and do utilize the stop pins. There are 3 different QR devices which will utilize the Monoball Fix plates.
The 802294 lens plate is excellent for lenses and is supplied with 2 screws and an anti-twist toe as well, for lenses with a foot for mounting. New plates are expected shortly with Anti-twist pins installed for the newest bodies.
The Classic and Fliplock QR's incorporate both the Monoball Fix and Classic plates. This has been the convention for over 5 years now. The Monoball Fix QR device will accept only Monoball Fix plates.
Rod

Rod, thanks for the info. In the photo above, what is the groove for? Thanks

So, does this clamp accept normal Arca plates like Kirk etc.?

mrmarks wrote in post #14754384
What would be the advantage of using the p30 or p40 compared to the p20 (which was specified for the 70-200 f2.8 IS)? Thanks

One advantage of a slightly longer plate is you can use it on more than one lens, meaning a lens that calls for the p30 or 40. Yes, it will stick out on the 70-200, but it also give you better grip if you carry your camera/lens combo that way.

Also, it gives you more wiggle room, so to speak, when placing it in the tripod, meaning you can move it back and forth further to balance the camera and lens atop the ballhead better.