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Davo McConville

Tripods 101: how do you measure the bowl?

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I have a couple of old Vinten tripods, and I'd like to kit them out with heads and spreaders (currently just the legs). 

 

Can anyone tell me how exactly how to measure the bowl size? The measurement across the interior is about 85mm. So does the measurement need to be taken from the ring around the top? Which would be more like 100mm?

 

Or am I looking at a couple of 75mm tripods? Thanks!

IMG_3505 2.JPG

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Interesting issue. The bowl on the legs has a machined ring on the inner surface at the top. I think that its inner diameter (ID) is normally a bit less than the nominal bowl diameter (75/100/150). Just measured a 150mm (Satchler?) 150mm bowl and it was ID=145mm. I think if you have ID=85mm on a Vinten it will be a "100mm" bowl.

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