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ABOUT TRIPOD, HEAD AND VIBRATION

MARCH 2005

was even doubled in this long-armed head.

VIBRATION AMPLITUDE [um]

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0.4 0.5 0.6 0.7 TIME IN SECOND

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sidering individual deviation even among the same model. However there are some differ- ences in patterns of vibration

It should be noted again that experimenting with this setup was not easy. Except Markins M10 and M20, all tripod heads were sliding (rotation- al). The actual sliding speed was so slow that it was hard to get the feel of sliding without help of a high resolution displacement sensor. I could easily see the motion with a speed about 2~4um/sec at point ‘B’. This made it difficult to release the shutter for experiments.

[Hakuba 3 way]

Similar pattern was obtained for this unusual off center configuration ball head from Gitzo. While usual ball head from Gitzo will work fine, only light camera setup seems acceptable for this specific kind of head.

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[Gitzo off center ball head]

It is important to align the origin of vibration with major structure. Providing offset will work if the load on top is light and only if the vibration is coming from outside not from inside.

VIBRATION AMPLITUDE [um]

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[Markins M20]

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0.5 0.6 0.7 TIME IN SECOND

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1.0

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Available professional ball heads were tested with the same condition. All are reported to be very good from users around the world. Their performances are almost equal in practice con-

[Markins M10]

PAGE 7 OF 15

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0.3 [Arca Swiss B1 0.4 0.5 0.6 0.7 TIME IN SECOND 26 ]

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[ F O B A 2 0.4 0.5 0.6 TIME IN SECOND 7 ]

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One may get the wrong impression that the re- sult of FOBA is the best. But remember that the mass of the M10, M20, B1 and FOBA are different, and FOBA that we used has no panning base. And what I came to know is the durability of FO- BA is not that good compared with Markins or Arca Swiss. My experience of that specific FOBA ball head under test is that it was not smooth in operation. It has something close to the stick and slip feels of the cheaper ones. Recently there are many new ball heads released in the 28

26 27 CLA(clean-lubricate-adjust) by Mr. Mah Only ball head tested here having no panning func- tion 2007 28

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