NavList:

Dear Red,
Thank you for the interesting site suggestion:

>  Try www.emachineshop.com. You can design it on your own compuer

I might try to design an eyepiece filter that is missing
on my pocket sextant. I just wonder how much will it cost:-)

Designing and making a whole sextant seems to be an utopia.
The cost will probably be prohibitive even if they could make
one, which I doubt. (I cite as an evidence that C. Plath apparently
went out of business because the PROCESS of frame manufacturing
was too expensive). In addition, I doubt that I can design a good one:
there is at least one part in a sextant whose construction I don't
understand, this is the ball bearing that connects the arm with the frame.
The part you never see disassembled. I am not sure how to make it
rotate exactly around the geometric axis of the frame. And there
are of course many other problems...

> > > Sextant of my dream will have 0.1' accuracy
>
> Although I seem to remember, the list agreed that much accuracy in the
> instrument still could never really be appreciated

Sure. There are many other factors affecting accuracy in the real life.
I was talking about only one factor: the sextant quality.
So that when I obtain poor results I could know that they are due
either to my own errors or to the atmospheric conditions.

Alex.



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