40 seconds? sounds like a long time.
BTW if someone is desperate I would be willing to part with a one or two eclipse glasses, I bought from Deloy. No mark-up. 801 792-4031 Erik Brent,
Thanks for that excellent write-up about welders filters. Highly informative.
I've found that the #14 welders glass, regardless of source, tints the Sun strongly green. I've also discovered that it's a lot more pleasant to look through if I also use my sunglasses with it.
I have successfully mounted the little eclipse glasses filters in front of the objectives on a pair of 7x35 binoculars (electrical tape covering any portion of cardboard frame that would let light leak into the binocs), and found they work great. A poor-man's binocular filter.
Seth
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Brent Watson Sent: Friday, May 18, 2012 3:42 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] DeLoy
I just had a chance to look at the sun with the planetarium filter. I did NOT notice any difference in sharpness compared to my glass filter, nor did I see a halo from the planetarium's filter. It also attenuates the sun more visually than my shade 14 welders glass filter. In the welders glass the sun has a green color and in the planetarium filter it has a yellow color.
________________________________ From: Brent Watson <brentjwatson@yahoo.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Friday, May 18, 2012 3:12 PM Subject: Re: [Utah-astronomy] DeLoy
Dr. Chou also mentions that the Baader film has the aluminization on the inside of two layers of plastic and so the alluminum will not scratch.
________________________________ From: Seth Jarvis <SJarvis@slco.org> To: 'Utah Astronomy' <utah-astronomy@mailman.xmission.com> Sent: Friday, May 18, 2012 2:46 PM Subject: Re: [Utah-astronomy] DeLoy
Brent,
#14 welders' shade is _barely_ in the safe zone, physiologically speaking. It's been carefully measured. #12 might "feel" OK to look through, but dangerous amounts of IR are getting through.
Retinas don't register pain.
http://www.transitofvenus.org/june2012/eye-safety/280-viewing-the-transit-ey...
Seth
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Brent Watson Sent: Friday, May 18, 2012 1:42 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] DeLoy
Has anyone checked the welding supply houses around town? #12 welders glass is OK, but a bit bright. Best is #14. I have a couple I plan to use this weekend. I usually keep one in my truck and one in my car. Many sunspots are naked eye visible.
________________________________ From: "jcarman6@q.com" <jcarman6@q.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Friday, May 18, 2012 1:04 PM Subject: [Utah-astronomy] DeLoy
Thanks for the announcement Seth. T ried to contact her yesterday about the glasses at the planetarium, but we couldn't hook up. T old her to get over to the Planetarium asap this morning. S uspect she's missed the boat, but waiting to hear from her . She might have got there around noon.
It gets INCREDIBLY frustrating to have people decide they want to participate at the last minute. I'm delighted they want to go . W asn't planning on taking the C-8 with the mylar filter, but will now. I have a 3" finder scope with a #14 welder's glass ready to go. That was all I was going to take (well the camera and a tripod, of course). Hmm after loading all that, hope there's room for the chairs lol.
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