I came across this in the December 1975 S&T, p431.
It claims to have a cone occulting disk, an adjustable iris, tilting filter element, optical transfer lens and a Herschel wedge (sound familiar, Alexandra??)
It is shown mounted on a SCT (and Newtonian) with NO additional filters (!!!!!) and the blurb says "Only the Criterion SPV works with any telescope. Newtonians require a simple slight modification of the primary mirror (I'm assuming moved up the tube to provide focus??) All Cassegrain telescopes can be used without any modification whatsoever"
No mention of ERF's or cooked secondary mirrors......
Has anyone seen one of these?????
Criterion Solar Prominence Viewer
- Merlin66
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Criterion Solar Prominence Viewer
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
- Valery
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Re: Criterion Solar Prominence Viewer
If only this device will be successful it will lasts until today for sure. But where it is?
There is no free lunch here and there.
There is no free lunch here and there.
"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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Re: Criterion Solar Prominence Viewer
Those components you mentioned sound similar to a coronagraph e.g. Baader Mark-IV Coronagraph?? Also see some discussions on cloudy nights here: https://www.cloudynights.com/topic/2603 ... ce-viewer/
And here: https://www.cloudynights.com/articles/c ... agraph-r36
Ted
And here: https://www.cloudynights.com/articles/c ... agraph-r36
Ted
Lunt LS80THa DSII Quark Prominence ES127mm refractor
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Re: Criterion Solar Prominence Viewer
Hi Merlin, never saw one, but found some infos on CN:
https://www.cloudynights.com/topic/2603 ... ce-viewer/
Never did it myself, but I have seen solar projection with Schmidt cassegrain in those time, so dangerous for many reasons.
Is it this add? (thanks waybak machine)
https://www.cloudynights.com/topic/2603 ... ce-viewer/
Never did it myself, but I have seen solar projection with Schmidt cassegrain in those time, so dangerous for many reasons.
Is it this add? (thanks waybak machine)
- Montana
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Re: Criterion Solar Prominence Viewer
Mine has an iris, cones and there is supposed to be a red filter and Halpha filter too. I didn't trust it so I used my Baader D-ERF on the front as well. Hopefully it will be fixed soon and I can have a good test of it
So perhaps this one has all the filters too.
Alexandra
So perhaps this one has all the filters too.
Alexandra