[ATMoB-discuss] Day Star Filters

[mmotta at massmed.org]

I wanted to stress that the prefilters
of these 2 systems are not the same, and
need to use the proper prefilter with
each system.

Mario

On Fri, 27 Jul 2007 16:10:10 +0000,
pbealo at comcast.net wrote:

> 
> I believe the ERF in a Daystar  system
> blocks UV and most visible light as
> well. I don't know why Mario brought up
> Coronado - but I can state that the
> Coronado ERF alone has high UV
> transmission and absolutely requires a
> separate UV blocker - which is included
> within Coronado systems.
> 
> Peter
> 
> 
>  -------------- Original message
> ----------------------
> From: mmotta at massmed.org
> > I have one of these.
> > They are NOT the same as the Coronado
> > filters and should not be
interchanged.
> > Each works as a system.
> > The IR blocking filter goes on the
> front
> > end as a prefilter, the rest of the
> > T-scanner goes on the focuser, and is
> > tuned there. The Scanner must NEVER
be
> > used without the prefilter in front
of
> > the objective.
> > 
> > Mario Motta
> > 
> > On Fri, 27 Jul 2007 11:42:53 -0400,
> > noatak at aol.com wrote:
> > 
> > > 
> > > 
> > > A?e-friend of mine from Bolivia has
> > just
> > > acquired a T-Scanner Daystar solar
> > > filter with an IR Blocking
filter?and
> > > has asked me some questions as to
> it's
> > > use which I cannot answer because
> I've
> > > never used one. If someone could
> answer
> > > these questions I would appreciate
it
> > > and will pass the response along.
> > > 
> > > Mike Hill
> > > 
> > > 
> > > 
> > > 1.? Will an IR Blocking Filter work
> the
> > > same as an energy rejection filter
> > (ERF)
> > > 
> > > 2. Where is the proper place to put
> the
> > > IR Blocking filter.
> > > 
> > > Any general comments as to it's use
> > > would also be helpful but these
were
> > the
> > > two questions posed in particular.
> > > 
> > > 
> > > Thanks for any replies.
> > > 
> > >
> >
>
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