ATM Brandon 20mm Coma-Corrector

[astro.electronic@t-online.de (Michael Koch)]

> Michael,  I have had a set of Brandon eyepieces for 30 years.  The whole
> coma correcting idea has only benn around for about 20 years (at the ATM
> level anyway).  I have not heard that Brandon ever made such an
> eyepiece.  It may have been a after-market addition by someone.

Dan, I think this eyepiece is really from Brandon. It is very good for scopes in 
the f/4 range and has about 60 degrees field of view.
I have one such eyepiece and there is written on it:

BRANDON COMA-CORRECTOR 20mm EFL VERNONSCOPE U.S.A.

The reason why I asked for a supplier is that I'd like to have a second one for 
a binocular.

Michael
 
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 ASTRO ELECTRONIC  Dipl.-Ing. Michael Koch
         www.astro-electronic.de
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