Ghost-Fire wrote:
Valery: Aries Safix solar blocking filters; better strehl, tighter out of band blocking?
Telescope - SAFIX - Barlow Lens - BF - camera.
Barlow and refocus your blocking filter?
Re: Barlow and refocus your blocking filter?
Telescope - SAFIX - Barlow Lens - BF - camera.
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
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Merlin66
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Re: Barlow and refocus your blocking filter?
Not sureI understand the question or the rational...
Are you trying to say that the bandwidth of the blocking filter (nominally 10A) would be improved? Or that it could be used as a stand alone Ha filter in some way??
Are you trying to say that the bandwidth of the blocking filter (nominally 10A) would be improved? Or that it could be used as a stand alone Ha filter in some way??
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
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christian viladrich
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Re: Barlow and refocus your blocking filter?
As put forward above, the FWHM of a BF is quite large (from 6 to 10 A). The enlargement of the FWHM due the F/D ratio would be rather small, at least as long as we stay higher than say F/15.
The two images from Alexandra are for a single Fabry-Perot or a double stack Fabry-Perot. So, I am not sure if your question is about the position of the BF or the "F-P" ?
So maybe, your initial question was about the position of the F-P
The two images from Alexandra are for a single Fabry-Perot or a double stack Fabry-Perot. So, I am not sure if your question is about the position of the BF or the "F-P" ?
So maybe, your initial question was about the position of the F-P
Christian Viladrich
Co-author of "Astronomie Planétaire"
http://www.astroplanetes.com/
Co-author of "Astronomie Solaire"
http://www.astronomiesolaire.com/
Co-author of "Astronomie Planétaire"
http://www.astroplanetes.com/
Co-author of "Astronomie Solaire"
http://www.astronomiesolaire.com/
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