[ATMoB-discuss] Day Star Filters

[pbealo at comcast.net]

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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