Re: [APML] Sky-watcher

[Roland Roberts <roland@astrofoto.org>]

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

    >> I am thinking of purchasing a 102/500 rich-field refractor on
    >> an EQ-3 mount or a 120/600 rich-field refractor on a Gem-1
    >> mount.

    Joseph> The 102 has a lot of chromatic abberation, and some other
    Joseph> faults too.  Not wishing to bite the hand that feeds me,
    Joseph> but I cannot reccomend it as a serious astro-photo
    Joseph> instrument.  If you want to do some black7white work using
    Joseph> a yellow or Minus Violoet Filter from Sirius optics, that
    Joseph> might work,b ut the scope is really a visual instrument.
    Joseph> Not saying you cannot try it, but I think ultimately,
    Joseph> you'll be fustraited.

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.
I don't know what he was using for a mount....

Doing tricolor images seems like a possibility, but I haven't seen
anyone do this.  

roland
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Roland B. Roberts, PhD                             RL Enterprises
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