Re: ATM building a finder

["bill kocken" <wmkocken@hotmail.com>]

I feel pretty foolish.  I thought I had the objective in correctly, but I
took it apart and turned it around.  Guess what? much better!  This is my
1st attempt at building a refractor, even if it's only 50mm.  Maybe I should
stick to reflectors. ;-)

Thanks,
Bill K
----- Original Message -----
From: <luthastro@earthlink.net>
To: "bill kocken" <wmkocken@hotmail.com>; <atm@shore.net>
Sent: Sunday, October 19, 2003 6:05 PM
Subject: Re: ATM building a finder


>
> >The image in it is terrible.  Even in the
> >daytime, the outer 1/2 to 1/3 is blurry.  At night stars are a total
> >mess. Does anyone have suggestions?
> >Is it necessary to stop down the objective?  How much would you
> >suggest? Might it help if I flip the lens to put the other face
> >outward? Other ideas appreciated!
>
> My first thought is to wonder if you really got an achromat as an
> objective.  I've not had nearly so much trouble as you seem to and I've
> built quite a few refractor type scopes including finders.
>
> I assume you tried the objective both ways.
>
> Jim L
>
>