Re: [APML] 1st BRC mosaic: heart & baby

["Bobby Middleton" <bobm@koyote.com>]

Yes I understand the difficulty. That's why I have gone this long without
trying. The secondary is not centered now and I suspect that is why TNR
assumed they had it collimated. But I can see fairly easily that the
secondary is not critically centered with the optical axis. That will be my
first step; centering the secondary.
This scope has enormous potential. But there remains to be seen if one can
be collimated by 1), Takahashi or one of their dealers; OR 2), one of the
scope's owners. I guess we'll see where me and Takahashi get to before we
are through.
Bobby M

----- Original Message -----
From: "Loke Tan" <tan@cox.net>



> Bobby,
>
>  I got my Tak E210 new and supposedly TNR collimated it but it was way
off.
> I placed an eyepiece to it and the out of focus rings looked completely
> squashed. I have been trying to collimate this scope for many months now
and
> I think I have it right. The BRC would be significantly more challenging.
> The hyperbolic secondary makes traditional techniques of collimating not
too
> useful. Furthermore, you will be sensitive to secondary centering.
>
> Loke
>
>
> > -----Original Message-----
> > From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
> > Behalf Of Bobby Middleton
> > Sent: Sunday, November 17, 2002 2:30 AM
> > To: astro-photo@seds.org
> > Subject: Re: [APML] 1st BRC mosaic: heart & baby
> >
> > I have not tried to collimate this scope yet. It came with a
> > collimation job
> > from TNR but I'm afraid they did not get it right. That's what is really
> > scary, and I am very reluctant to try. But the collimation issue is bad
> > enough for me to make the attempt and I just ordered the collimation
tool
> > from TNR. I hope you are right about the manual being newly translated.
I
> > have one of the Japanese manuals and the diagrahms will be helpful but
> > that's about all. I will be talking to the guys from TNR about this.
> > Bobby
> >
> >
>
>
>
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