Actually I just got done reading the Astronomics Web site and they said that
if you use an SCT field flattener/Reducer on a Refractor, you actually CAUSE
field curvature near the edges becasue the flattener is trying to correct an
image that is already flat. I just wonder how bad it does that with the
Meade Refractors.

m.

Paul Sterngold wrote:

> And in particular, you and I are both looking for a *reducer*, not
> just a flattener. :-( In any case, I haven't even tried photography
> with it yet at f/9, so perhaps it's premature for me to be looking for
> a reducer.
>
> -- Paul
>
> >
> > I am sure he does great work, and I am interested in a focal reducer
> for
> > my scope,
> > just not quite that interested in spending quite that much $ and going
> > half way
> > around the world (I guess my level of commitment is showing!).
> > Looking for something closer to home and more readily available.
> >
> > Thanks for the suggestion, though.
> > m.
> >
> >
> > > In a message dated 12/3/98 11:37:06 AM Eastern Standard Time,
> > >
> > > << I would like to reduce the focal ratio of my Meade F/9 (5")
> Refractor
> > > for primarily DS photo work with some visual use and was
> wondering if
> > > there are any recommendation for a Focal Reducer or
> Telecompressor to do
> > > this. (Look for F/7 or better).
> > >
> > > Right now the only two things I have heard of are to either use the
> > > Meade SCT 6.3 Focal reducer with an adapter, or possibly AP has a
> .75
> > > Telecompressor that is used on their EDF and EDT line, however it
> > > threads into the back of their 2.7" focuser which may have
> different
> > > threads then the Meade 2.7" focuser. >>
> > >
> > > You may be in luck!
> > >
> > > I recall that quite a while ago, (former?) MAPUG member Valery
> Deryuzhin of
> > > Aries Instruments Co. (58 Ushakova Str., kv. 39 Kherson, 325026,
> Ukraine)
> > > designed a series of APO corrector/reducer?/flattener lenses for
> the Meade 4",
> > > 5", 6", and 7" ED refractors. He claimed that they would improve
> the color
> > > correction to genuine APO levels over a limited field of view the
> diameter of
> > > which I forget, but my impression was something like 0.33 or 0.5
> inch image
> > > diameter fully corrected to the same level as an AstroPhysics
> refractor. I
> > > think it was also a flattener for photography over a larger
> diameter.
> > >
> > > I have done a couple of searches of the archives and haven't found
> the
> > > original post yet.
> > >
> > > I have no idea if anyone has taken him up on making one for them,
> but if they
> > > have, I haven't heard about it.
> > >
> > > The prices varied by aperture, and were somewhere around $500 for
> the 5". If
> > > you decide to take this route, I'd recommend having the German
> dealer Markus
> don't want to
> > > become an expert in Ukrainian export and customs law.
> > >
> > > Valery is almost certainly a world-class optician, and Markus
> brought an 8"
> > > Aries fluorite APO to the last Stellafane, which was rated by some
> people on
> > > s.a.a. as approximately equal to or possibly higher in quality
> compared to a
> > > nearby Takashashi 6" fluorite.
> > >
> > > Roland Christen of AstroPhysics has also stated that the coatings
> on the Aries
> > > optics he has seen are world-class.
> > >
> > > In any case, I've been patiently waiting for one of you Meade ED
> "APO" owners
> > > to take the plunge on one of these Aries correctors, and be the
> guinea pig for
> > > all of us.
> > >
> > > :-)
> > >
> > > John
> >
> >
>
> _________________________________________________________
> DO YOU YAHOO!?

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