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@???] 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@???] 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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