Re: Mounting ideas for binos and scope
From: Larry Brown (astronomer_at_fuse.net)
Date: 07/02/04
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Date: Fri, 02 Jul 2004 12:14:59 -0400
Look at the parallelogram mounts that are sold commercially. These are easy to
build, and even easier to buy!
The beauty of this type of mount is that when you have an object centered in
the field, you can push the mount downward several feet so that a much shorter
person can look and the object remains centered in the eyepieces. I bought one
for my giant binocs and take it to every star party.
Clear skies.
Larry Brown
Ioannis wrote:
> For some reason I was confident, around 7 months ago when I ordered my
> 20x100 binoculars that mounting them would be easy.
>
> The results are almost catastrophic. I had an engineer built a "T"
> bracket, which screws on top of my professional Chinon tripod. "T"s head
> contains holder rings, which nicely accept my Tasco. "T"s bottom
> contains a hole which accepts a butterfly screw that goes under the
> 20x100. I have arranged for the difference in weight, so all is well in
> terms of design.
>
> As it turns out, although correct, the entire system is dysfunctional.
> The tripod's altitude and azimuth controls, although robust, become
> extremely hard to control, when the viewing angle is ~40-45 degrees
> above the horizontal. The rotation of the tripod head causes the
> rotation of the support bracket T and as a result, the center of mass
> moves off approximately 10-12cms away from the tripod head.
>
> The total weight of the system head being around 9 lb., it becomes a
> Herculean task to rotate the head without some serious effort, when the
> angle is large.
>
> Does anybody know of an alternative patent that would minimize
> displacement of the center of mass on my system? The way I understand
> it, rectangular brackets won't be much of an improvement, but I am not
> 100% sure.
>
> I am of course interested in keeping the two optical systems aligned,
> that's why all the fuss. The Tasco and the binos point at the same point.
>
> What about adding counterweights on the head? Seems to be the reasonable
> solution.
>
> Ideas welcome, and thanks in advance,
> --
> I. N. Galidakis
> http://users.forthnet.gr/ath/jgal/
> ------------------------------------------
> "The best way to predict reality, is to know exactly what you _don't_ want".
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