Phil
I got my filters from Orion. The name of the broadband is Sky Glow. I'm
hoping to test them out on a clear night and decide whether or not to keep
them. Apparently I will have 30 days to return them.
Bill
-----Original Message-----
From: P T Chambers [SMTP:ptchamb@No-Spam]
Sent: Monday, August 02, 2004 5:27 PM
To: gatorchaser@No-Spam; The Astronomy Connection
Subject: RE: [TAC] Least Useful
Hi
The Vblock is a double ended filter (blocks both IR and UV) and is useful
on bright objects in an ST80 or ST120 to keep the extraneous color down.
The narrow band is good for some nebulas and so forth. There are several
kinds out there. I have used them on my N5 and they seem to work OK so it
should work on your 5 inch. On small scopes they block too much light
but 5 inches is big enough to profitably use one.
I dont know which broadband you have but a lot of folks dont find them
very useful. In general, they block the light from sodium streetlights
and if your neighborhood is filled with these, you might like it. OTOH,
they dont do anything for white lights like incandescent and halogen.
---------
Phil Chambers [ptchamb@No-Spam] (S.F. Bay Area - Calif. USA)
On Mon, 2 Aug 2004, Bill wrote:
> I recently ordered a broadband, narrowband and V-Blocking filters from
> Orion. I hope I am not wasting my money. i will be using them on my
Orion
> Astroview 120ST.
>
> By the way, I'm moving to Alameda from Louisiana in september and am
> looking forward to finding a good club and a few observing sites. From
> what I can tell there are a few sites that most people go to. Fremont
Peak
> seems to be the most popular. When I finally get set up in Alameda is
> there a place I can go to get info on these sites and the various bay
area
> clubs?
>
> Bill Drelling
>
>
> -----Original Message-----
> From: Michelle Stone [SMTP:tac4mstone@No-Spam]
> Sent: Monday, August 02, 2004 1:28 PM
> To: The Astronomy Connection
> Subject: RE: [TAC] Least Useful
>
> My least useful filter is the H-Beta supposedly used for viewing B33, the
> Horsehead. I think I tried it once and then I yawned. BTW, I'll sell it
> for %65 of list if anyone is interested.
>
> Michelle Stone
> Argo Navis and
> Custom Telescopes by Plettstone
> http://www.plettstone.com/telescopes
>
> > -----Original Message-----
> > From: sf-bay-tac-bounces@No-Spam
[mailto:sf-bay-tac-bounces@No-Spam]On
> > Behalf Of Jeff Crilly
> > Sent: Sunday, August 01, 2004 11:41 AM
> > To: The Astronomy Connection
> > Subject: Re: [TAC] Least Useful
> >
> >
> > > I began wondering if anyone uses them, and why there hasn't been a
> > > comparison of moon filters.
> > >
> >
> > I used your moon filter once, back in like 1997. I found it mildly
> > useful, so I got one. It improved constrast a bit with the 8".
> > With the 4", no filter is needed at high power... its dim enough.
> > I prefer to use a red filter on the moon. Saves the night vision.
> > The best moon I saw was with turley's purple filter.
> >
> > > Then I found an old Lumicon Deep Sky Filter. Never had much
> > luck with it,
> > > so its been sitting in the unused bin for a long time.
> >
> > Yep.. got one of them also -- got it on the cheap, I think. Also
1.25".
> > Somewhat useful for photography (i'm told, never tried to use it). I
did
> > use it visual on the 13" in the backyard, and it made m51 go from
> > nothing to
> > ~barely~ visible -- afaict, the deepsky filter is basically an
> attenuator.
> >
> > >
> > > Anyone want to put their items on such a list (do so here,
> > posting to TAC).
> > >
> >
> > - Any kind of colored filter. I just never really could see a
> > difference on the planets.
> > - 5x25 finderscope.
> > - inexpensive 1.25" 40mm plossl - I dunno, maybe one cant expect much.
> > - fwiw, I dont use the 17mm type4 much. Too heavy.
> >
> >
> >
>
>
>
Received on Mon Aug 2 19:43:25 2004