I thought I could find this material locally, but not so much. There is an item called a "sun funnel" which allows an image of the sun to be projected thru an eyepiece in a telescope, up thru a funnel attached to the eyepiece, onto some screen material allowing several people to observe at once. The material on the wide end of the funnel is Da-lite High Contrast Da tex, rear surface projection screen material. This is the material that is needed, or a suitable substitute. I am thinking many people on the list would like to build one before Tuesday. Google "sun funnel" and hit the first link for instructions on building one, then respond ASAP if you know where the Da-Lite stuff might be obtained. Thanx, Ron
Ron: Da-Lite is a brand name that Inkley’s use to carry They still have some Da-Lite products there. They sold lots of screens and products. I can’t imagine they have anything like small pieces but I don’t know that for sure. The simple answer is someone like Inkley’s, Pictureline or a company like them. Steve
From: deepsky100@msn.com To: utah-astronomy@mailman.xmission.com; oas_news@yahoogroups.com Date: Wed, 30 May 2012 19:15:50 -0600 Subject: [Utah-astronomy] sun funnel
I thought I could find this material locally, but not so much. There is an item called a "sun funnel" which allows an image of the sun to be projected thru an eyepiece in a telescope, up thru a funnel attached to the eyepiece, onto some screen material allowing several people to observe at once. The material on the wide end of the funnel is Da-lite High Contrast Da tex, rear surface projection screen material. This is the material that is needed, or a suitable substitute. I am thinking many people on the list would like to build one before Tuesday. Google "sun funnel" and hit the first link for instructions on building one, then respond ASAP if you know where the Da-Lite stuff might be obtained.
Thanx, Ron _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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You can certainly use any type of cloth suitable for projection. I do alot of work with video projectors, and have projected onto all sort of surfaces, one of my favorites being "Dance & Swim" fabric, available at Jo-Ann and Hancock Fabrics stores locally. They almost always have white, and sometimes dark gray. I'm thinking I'll try my hand at building one of these tomorrow. The fabric is usually $11-$15/yd, and is 80% spandex, so a little goes a long way. On Wed, May 30, 2012 at 7:15 PM, RON VANDERHULE <deepsky100@msn.com> wrote:
I thought I could find this material locally, but not so much. There is an item called a "sun funnel" which allows an image of the sun to be projected thru an eyepiece in a telescope, up thru a funnel attached to the eyepiece, onto some screen material allowing several people to observe at once. The material on the wide end of the funnel is Da-lite High Contrast Da tex, rear surface projection screen material. This is the material that is needed, or a suitable substitute. I am thinking many people on the list would like to build one before Tuesday. Google "sun funnel" and hit the first link for instructions on building one, then respond ASAP if you know where the Da-Lite stuff might be obtained.
Thanx, Ron _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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-- Chrismo I fix things, all kinds of things... (801) 897-9075
Certainly could make for some exciting demonstrations! On Wed, May 30, 2012 at 7:28 PM, Patrick Wiggins <paw@wirelessbeehive.com>wrote:
On 30 May 2012, at 19:26, Chrismo wrote:
You can certainly use any type of cloth suitable for projection.
Flash paper?
:)
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-- Chrismo I fix things, all kinds of things... (801) 897-9075
Back in the '70's, before such products were available, I made a rear-projection viewer box for my slide projector. SLAS used it for a couple of years at our booth at the Utah State Fair. For a screen, I just ground a piece of Lucite (plexiglass) with some 200 grit mirror grinding abrasive. Worked great! On May 30, 2012 7:17 PM, "RON VANDERHULE" <deepsky100@msn.com> wrote:
I thought I could find this material locally, but not so much. There is an item called a "sun funnel" which allows an image of the sun to be projected thru an eyepiece in a telescope, up thru a funnel attached to the eyepiece, onto some screen material allowing several people to observe at once. The material on the wide end of the funnel is Da-lite High Contrast Da tex, rear surface projection screen material. This is the material that is needed, or a suitable substitute. I am thinking many people on the list would like to build one before Tuesday. Google "sun funnel" and hit the first link for instructions on building one, then respond ASAP if you know where the Da-Lite stuff might be obtained.
Thanx, Ron _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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participants (5)
-
Chrismo -
Chuck Hards -
Patrick Wiggins -
RON VANDERHULE -
Steve Fisher