Brent,
I have searched the web for 52-48 mm solar filters, seems most ideas of solar filter for camera's, is a PST or like h-alpha filters. I am pondering wether or not a 15% transmission polarizing filter is enough to protect a digital camera (at some 95% blockage of the sun). Any thoughts? maybe paired with an H-alpha Blk&white filter. Erik Thanks Seth, but there wasn't much new there, nor did it really answer my
question. I guess I'll fall back to my original plan of building an adapter for my 4" glass filter for use on my camera.
From: Seth Jarvis <SJarvis@slco.org> To: 'Utah Astronomy' <utah-astronomy@mailman.xmission.com> Sent: Wednesday, May 2, 2012 3:29 PM Subject: Re: [Utah-astronomy] Solar glasses
Hi Brent,
Have a look at a blog article written by Duke Johnson, our Education Manager (and an accomplished astrophotographer) on the subject.
http://clarkplanetarium.org/photographing-the-may-20-annular-eclipse/
Good luck!
Seth
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Brent Watson Sent: Wednesday, May 02, 2012 3:04 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Solar glasses
Seth, Do you have solar filters for cameras? I am looking specifically for a 52 mm white light or Halpha filter. Thanks, Brent
From: Seth Jarvis <SJarvis@slco.org> To: 'Utah Astronomy' <utah-astronomy@mailman.xmission.com> 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@mailman.xmission.com [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@slco.org> To: 'Utah Astronomy' <utah-astronomy@mailman.xmission.com> 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@mailman.xmission.com [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?
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