Let me share the Has V version image.
Sunchai.
Sunchai.
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Thanks, it certainly does help! It confirms what I was hoping for.I am sure that the following image may help.
Sunchai.
Ray, I think many will be agree to have the arca plate buit in to the bottom of the baseThanks, it certainly does help! It confirms what I was hoping for.
About the only thing I would improve about this design is the very bottom of the unit: that should also be machined with Arca-plate grooves, so that it could slot straight into the Arca-type clamping tripod heads that nearly everyone uses these days.
Otherwise, we would have to screw a separate Arca-type plate onto the base of the unit, and that introduces a risk of twisting flexure. It would also become an even more complicated stack of components! -
Tripod legs - head with Arca-clamp - Arca plate - L-plate base with clamp for L-unit - L-unit with Arca clamp - Arca plate for Camera - Camera!
Ray
It isn't the load weight which is the issue for cameras and heads; it's the lever moment, the propensity to twist around the axis of the screw. The 645 body plate has 2 pins to prevent this, but there is not a similar dedicated anti-rotation fitting on the base of the Flex unit, so any plate or head (Arca or not) you attach it to would not keep it as rigid as if the unit itself were machined with Arca QR grooves.I have found the following table which showed the load of screw which may be useful:
The table at the (Grade S)showed
the Load of ¼ inch screw is 2192 Lb.
the load of 3/8 inch screw is 5354 Lb.
weight of Phase One or Mamiya body is (1030g.or2.266 Lb.)
weight of the most heavy lens is75-150mm = (1800g. or 3.96 Lb.)
weight of the digital is difference belong to what digital back is mounting on,
the weight given with in 2000g. or 4.4 Lb.
total weight = body+digitalback+lens (2.266+3.96+4.4)= 10.626 Lb.or 4,830g.
Sunchai.
great!
So we should contact/order via ksc.co.th?
They just show an email (no web e-store)!
How did you pay (bank to bank transfer)? Has somebody actually received to real product?
Ray,It isn't the load weight which is the issue for cameras and heads; it's the lever moment, the propensity to twist around the axis of the screw. The 645 body plate has 2 pins to prevent this, but there is not a similar dedicated anti-rotation fitting on the base of the Flex unit, so any plate or head (Arca or not) you attach it to would not keep it as rigid as if the unit itself were machined with Arca QR grooves.
I speak from long and often frustrating experience when it comes to trying to keep cameras, longer/heavier lenses, or telescopes from twisting on their tripod screws. Even tightening things to breaking point was sometimes not enough.
You really need the design to be "anti-rotation" at every interface in the chain...and the best anti-rotation interface of all is one where there is actually no interface, just a one-piece machined unit.
"How to prevent the Smart Flex with camera slip off from the arca clamp" - I think you are worrying unnecessarily about this. There is no slippage when an Arca-style clamp is sufficiently tight. Most of my Arca-plate devices came with no 'security screw', and I took the screws off those which had them, as they are an unnecessary nuisance. Anyway, letting your camera slip off the clamp falls into the realm of "user error"; Flex can't concern themselves with what a clumsy user might do. They should just focus on the designing it for best performance.
Ray
Do you have an Arca part number for that plate as it looks like it solves the potential twist problem?Ray,
in the case of the protection from slip off is not necessary may be the attachment image arca style
may be help some. The 2 bars have built in for anti-rotation.
this anti-rotation arca plate size is 50mm.wide 52mm.deep from the front and 10mm thick but only increase the total high of 8mm when mounted to the smart Flex.
As far as I can see , there is no such part in the ARCA camera plate program . I have some ARCA and NOVOFLEX plates here and will see if I can make them fit the L-PLATE . Using a milling machine of course .Do you have an Arca part number for that plate as it looks like it solves the potential twist problem?
Ah - that's more like it. OK, it's an extra piece to attach, but it does avoid the rotation problem. Is this another SmartFlex component?Ray,
in the case of the protection from slip off is not necessary may be the attachment image arca style
may be help some. The 2 bars have built in for anti-rotation.
this anti-rotation arca plate size is 50mm.wide 52mm.deep from the front and 10mm thick but only increase the total high of 8mm when mounted to the smart Flex.
That's what I thought.As far as I can see , there is no such part in the ARCA camera plate program.
This plate have designed and made for friend in Phase One.Ah - that's more like it. OK, it's an extra piece to attach, but it does avoid the rotation problem. Is this another SmartFlex component?
Ray