Re: [ATM] to make an eyepiece

[vorblesnak@peak.org]

I have made several eyepieces using the optics from Surplus Shed.  They
are for the most part quite usable, for my untrained eye.  Another good
source is old binoculars.  You must find the ones with individual focusers
as the eyepieces are one complete unit. As opposed to a central focuser
that moves the elements of the eyepiece to achieve focus.

David Davis
Toledo, OR

> Hello
>
> I just wondered about the Plossl or Symmetric design of eyepiece.  Can I
> use the achromat doublet that I found on this page:
>
> http://www.surplusshed.com/pages/item/l2076.html
>
> where it says that it is a MELLES GRIOT PRECISION ACHROMAT, 31.5MM DIA X
> 80MM FL              I could use two of them and then turn them so that
> their curved sides are facing each other and them space them so that
> they're almost touching and then bond them inside of an eyepiece barrel.
>
> As you can see the diameter is 31mm which is about 1.25" and will work out
> for a 1.25" standard sized eyepiece barrel.
>
>   Does anyone have some advice on this?
>
> Thank you.
> David
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