Category: Blog
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(continued from part 2) FWHM At the FWHM, or the 42.5%T point: The bandpass is measured in a single system at 0.7A. In DS system the bandpass is the multiplication of the 2 interference filters, 0.7A x 0.7A = 0.49A. To be specific: The new width of the Etalon T curve is moved by a multiple of the [...]
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continued from part 1 Uniformity of the etalon plates To continue where I left off in my last post, this widening of the BP from center to edge can be caused uniformity of the etalon plates, over-attenuation of the etalon via excessive tilting, differential heating (i.e., edge heating a solid [...]
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It is often stated that once you look through a Double Stacked Solar Telescope, you don't ever want to go back to Single Stack.  However, what is Double Stack and what are the benefits of having a Double Stacked system? There has been significant chatter on Lunt Social Media and e-mail lately [...]
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Still in need of lodgings for the 2017 total solar eclipse?  Southern Illinois University has you covered.  Located in Carbondale IL, SIU has the following packages still available for those that want to witness Nasa Edge and Lunt Solar Systems put on an amazing Live Megacast of this celestial [...]
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The Tucson Amateur Astronomy Association will be hosting an annual Astronomy Festival on Astronomy Day this Saturday April 29, 2017 from Noon – 9 PM at Brandi Fenton Memorial Park (River & Alvernon).  There will be 3 Lunt Solar Telescopes available to look through in the afternoon and about [...]
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A spectacular sight is coming up this year for much of the U.S. The August 2017 total solar eclipse is on its way and it's in your best interest to prepare to see it right now. Here are a few good tips on planning an unforgettable vacation to see one of nature's great wonders. Plan for Time [...]