Re: [APML] new 130 shot plus 2 galaxies

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

> From: Herm
> Very nice Bobby, seems like 30 minutes at f3 is a very long exposure..the
negs
> must have been nicely saturated.

T-stop will figure it somewhat slower than the geometric f/3.3. It's got a
big secondary. Thirty min seemed about right on hypered PJ400 while 40 min
was too long. 30 min on PZM 1000 was pushing it past the limit a bit.

>How do you like the E130 so far?, is it hard to
> focus?,

Focus seemed to fall pretty well. The heavy Tak focuser is good to use; the
critical focus point seemed easy to hit and my pics seem to be dead-on
focus.

>vignetting?

The vignetting is there but is workable. I'm hoping that tec pan will not
make this a lot worse but........


>how about guiding?

430mm F.L. is a breeze to guide...........except the first night I had very
minor trailing at best; bad trailing on a couple. Flexure of the guidescope
thingy. The next night out I really tightened the guidescope thumbscrews
down and had no flexure at all. I hope this will not be a come and go issue.
I suppose a st-7 or st-8 would solve that problem. (self guided).

>collimation?

The 130 comes with a collimating eyepiece and the primary and secondary are
marked which makes collimation a sure thing as best as I can tell. I didn't
see any problems in the pics.


>is there any way to attach a
> filter?

Yes; the Tak wide-mount adaptor is threaded for 48mm filters. The wide-mount
is necessary for camera-to-focuser mating.

>
> Lots and lots of questions (g)..

Lots of issues <vbg>
Bobby Middleton





> "Bobby Middleton" <bobm@koyote.com>  wrote:
>
> >I posted my first Tak Epsilon 130 image several days ago of the North
> >Am/Pelican nebula region. I had very slight trailing only visible under
very
> >high mag; a second night with better tightening if the guidescope
> >thumbscrews seemed to fix that. It's at:
> >http://www.koyote.com/users/bobm/ngc7000.htm
>
>
> --  APML Archives at <http://www.system.missouri.edu/apml/>  ---
>                 Unsubscribe at <majordomo@seds.org>


--  APML Archives at <http://www.system.missouri.edu/apml/>  ---
                Unsubscribe at <majordomo@seds.org>