Re: [APML] Sky-watcher

[Roland Roberts <roland@astrofoto.org>]

>>>>> "Joseph" == Joseph O'Neil <joneil@multiboard.com> writes:

    >> If you are willing to use other (narrowband) filters you can
    >> get nice results; someone was posting on
    >> alt.binaries.pictures.astro some H-alpha photos taken with with
    >> the 120 f/5 and they were quite nice.

    Joseph> For the money it is amazing as a visual scope, and you can
    Joseph> do some really nice daytime photography with it, but to
    Joseph> get some really nice, crisp star images, I think you have
    Joseph> to stop it down a bit, and you'll have a small fortune
    Joseph> tied up in filters by the time you are done.  Would not be
    Joseph> my first choice for tech pan.  :)

Well, I'm not about to compare it with some (most) of the equipment
people here seem to be using.  But the nice H-alpha photos are
certainly within the realm of possibility with a good mount.  Pretty
much *any* narrow-band photography is within the realm of possibility
even with an achromat since you are filtering out the part that
doesn't focus.  I seem to recall a message by Roland Christen about
how you could in principle even using a singlet so long as you weren't
worried about matching scale between images.

And the only reference to a picture using one of these scope is
http://mysky.org/mysky/?article_get=1&article=2:46943 done my Fred
Herrmann and it was taken with an ST8.  I don't know if he was the one
who posted several pictures or if it was someone else.

    Joseph> You know, as a society, I think we are not so much more
    Joseph> advanced than dark age alchemists who sought to turn lead
    Joseph> into gold.  It is quite probally cheaper to buy gold in
    Joseph> the first place than to waste all the time and resources
    Joseph> messing around with lead.  But alas, part of our psyche
    Joseph> always wants that something for nothing.  Or in this case,
    Joseph> we want USA craftsmanship at Chinese prices.

You'll get no arguments from me on this one.  My wife is a physician
and I'm trained as a physicist.  Between the two of we could easily
fill a book with all the goofy ideas people have proposed to
use---usually looking for support!  

roland
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