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

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

----- Original Message -----
From: "Loke Tan" <tan@cox.net>
>  Really nice shot. This must have been a lot of work. Did you have to
> anti-vignette the shots. Having used the BRC, I have been a bit afraid to
> attempt any mosaics with this scope dur to noticeable light dropoff in the
> 6x9 frame.

Thanks Loke. 6 hours exposure time and about 6 hours processing. I have been
reluctant to try a mosaic with the BRC for the very reason you mention and
yes, these shots received lots of attention to get the illumination even.

>  Bobby, have you attempted to collimate your BRC or are you using it as
is?

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

>
> Loke
>
>
>
> > -----Original Message-----
> > From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
> > Behalf Of Bobby Middleton
> > Sent: Saturday, November 16, 2002 10:56 AM
> > To: astro-photo@seds.org
> > Subject: [APML] 1st BRC mosaic: heart & baby
> >
> >
> > I finally tried a mosaic with the BRC. I knew I would have more color
and
> > brightness issues with the BRC's uneven illumination than I have to deal
> > with for my Newt mosaics, but it seemed to work out OK I guess. I
> > would like
> > everyone's opinion on the background color. I've tweeked and tweeked but
I
> > can't seem to find that "finished look" if you know what I mean.
> > http://www.koyote.com/users/bobm/Heartandbaby.htm
> >
> > I also had some film flatness issues that can be seen at higher
> > resolution,
> > and there's still the collimation to get right. I have a collimating
> > telescope on the way for the BRC now. Anyone who has experience in
> > collimation with one of these please e-mail me. (Steve, Loke--you guys
> > adjust yours any yet?)
> > The mosaic is 2 frames; each being a 2 stack of E200 (60 min) and a
single
> > 50 min TP exposure.
> > Comments and thoughts welcome.
> > Bobby Middleton
> >
> >
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>
>
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