Re: [Utah-astronomy] Solar glasses

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Author: Joe Bauman
Date:  
To: Utah Astronomy
Subject: Re: [Utah-astronomy] Solar glasses
I don't think I need to drag out a telescope at all, even though my old Celestron 8" still has a glass solar filter somewhere. It works as well as I need to just shoot from a 400 mm telephoto with a 2.75" binocular solar filter over the end. I'll post a sunspot photo I took today with that setup. Of course, the sun is fairly small at that scale, but I'll crop the image to show it. -- Joe



________________________________
From: Seth Jarvis <SJarvis@???>
To: 'Utah Astronomy' <utah-astronomy@???>
Sent: Wednesday, May 2, 2012 2:41 PM
Subject: Re: [Utah-astronomy] Solar glasses

We carry the Orion full-aperture glass filters.  For a 10" Dob it would be about $160. 

If you've got that kind of money burning a hole in your pocket, more power to you and you'll love it.

BUT, I question the need for that much of a filter. 

A far less expensive and probably just as useful solar filter could be made using a 4" off-center hole covered with Baader Astro Solar Safety film in a cardboard disk over your scope.  I know there's been plenty of discussion on this topic in these messages.

We've just sold out of the full-aperture glass filters for 8" and 10" Dobs, but Orion tells us they'll have more here in plenty of time for the eclipse.  If I had a nice 10" Dob, I'd get the Baader filter and make an off-center "solar filter dust cover" for my scope.  I suspect there's no shortage of people here who can tell you about how to make one.

Seth

-----Original Message-----
From: utah-astronomy-bounces@??? [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of william baker
Sent: Wednesday, May 02, 2012 1:50 PM
To: Utah Astronomy
Subject: Re: [Utah-astronomy] Solar glasses

Seth,
    What is the cost for a solar filter for an Orion 10xt Dobsonian?


________________________________
From: Seth Jarvis <SJarvis@???>
To: 'Utah Astronomy' <utah-astronomy@???>
Sent: Wednesday, May 2, 2012 12:34 PM
Subject: Re: [Utah-astronomy] Solar glasses

Ann,

We sell solar eclipse glasses here at the planetarium for $1.95 per pair.  Yes, you can get them for less online but you have to buy them in bulk as Wayne did.

We bought a lot of them in anticipation of public interest in both the eclipse and the transit of Venus on 6/5. People with good vision should be able to see Venus on the Sun with just the solar eclipse glasses. It'll be about the size of a medium sunspot.

The $1.95 eclipse glasses work great - they're made specifically for looking at the Sun.

We also sell glass solar filters for telescopes and binoculars - the same items you get online from Orion.

Also, you could go to a welding supply company and buy Grade #14 welder's helmet glass filter plate.  It must be Grade 14 (they call it "shade 14") or higher to be safe.  Costs about $4 for a 4" x  5" plate.  The Sun is a lovely shade of green through these.

No, you can't combine two #7's to achieve the same result. Doesn't work that way.

Seth

-----Original Message-----
From: utah-astronomy-bounces+sjarvis=slco.org@??? [mailto:utah-astronomy-bounces+sjarvis=slco.org@mailman.xmission.com] On Behalf Of Ann House
Sent: Wednesday, May 02, 2012 10:40 AM
To: Utah Astronomy
Subject: [Utah-astronomy] Solar glasses

I am looking to purchase solar glasses for the transit and the eclipse.
They are about a dollar each which worries me somehow. While I don't want to pay more than is necessary, I am wondering - really? - can I trust my eyes to be safe for a dollar? Thoughts?

-A
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