RE: [APML] Re: Bisque IFocus eyepiece

[Emmanuele Sordini <vega@bloomingstars.com>]

Hello Thom:

At 04.45 11/12/2003 -0500, you wrote:
>Emmanuele,
>         This is exactly the same approach I use for focusing my ST-5C I
>use as a guider.  I use a Meade 12mm illuminated eyepiece and a homemade
>setting ring.  The advantage I have is being able to use a pc to focus
>the ccd initially.

Just out of curiosity: what software do you use to focus your CCD camera 
with your PC?

>It doesn't matter whether you use your eye glasses
>or not as long as you do it the same way in the future.
>The crosshair
>eyepiece also really helps to center your star on the chip.

I agree: the illuminated reticle EP is a great help in finding a guide star 
and centering it.
I won't be using the very same scope, but anyway always one among a 
selection of a few that make up my gear:

1) An MTO (1000 mm f/10) catadioptric lens
2) A 60-mm, 700-mm-FL el-cheapo refractor
3) My 8" SCT with a Cassegrain Easy guider.

I suppose I can focus the first two instruments quite easily, and then 
forget about it; the refractor could be locked forever as I see no other 
sensible use for such a piece of c**p. As for the 1000 mm lens, it focuses 
by turning the front end (just as with most lenses that don't have internal 
focus capabilities); I think that a millimeter scale should make do.
The SCT could be the problem; but then again, if I can make an eyepiece 
perfectly parfocal (or buy one that already is), then my woes are possibly 
over.

Thanks,
Emmanuele


_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo