what if - h-alpha thru 17th century optics

Frankenscope? Let's see it!***be advised that NOTHING in this forum has been safety tested and you are reading and using these posts at your own peril. blah, blah, blah... dont mess around with your eyesight when it comes to solar astronomy. Use appropriate filtration at all times...
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highfnum
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what if - h-alpha thru 17th century optics

Post by highfnum » Mon Jul 04, 2016 9:32 am

about as practical as an 11 cent coin but it works and image wasnt bad

100mm lens 15 meter focal length ( i ground lens my self). 10 inch mirror (1/16 wave)

no tube -- note ERF placed when in use -- not in pics
20160702_131157_resized.jpg

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Re: what if - h-alpha thru 17th century optics

Post by highfnum » Mon Jul 04, 2016 9:36 am

the "eyepiece" etalon - 60mm objective is eyepiece 20 inch fl , blocking filter
you look thru blocking filter - no "little" eyepiece
20160702_175727_resized.jpg

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Re: what if - h-alpha thru 17th century optics

Post by highfnum » Mon Jul 04, 2016 9:40 am

what objective looks like from prime focus point
20160703_100619_resized.jpg

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Re: what if - h-alpha thru 17th century optics

Post by highfnum » Mon Jul 04, 2016 9:42 am

view - field of view is narrow
but could see proms and surface peach

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Re: what if - h-alpha thru 17th century optics

Post by highfnum » Mon Jul 04, 2016 10:27 am

quick drawing to give field of view feeling
Image0138.JPG

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marktownley
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Re: what if - h-alpha thru 17th century optics

Post by marktownley » Mon Jul 04, 2016 7:17 pm

Very impressive John! An interesting configuration :)
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Re: what if - h-alpha thru 17th century optics

Post by zorgdotnl » Tue Jul 05, 2016 7:09 am

Sounds interesting but the picts are invisible for me

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Re: what if - h-alpha thru 17th century optics

Post by Merlin66 » Tue Jul 05, 2016 8:39 am

Well done!
A very interesting experiment.....
"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

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Re: what if - h-alpha thru 17th century optics

Post by highfnum » Tue Jul 05, 2016 9:04 pm

i think pics are back but 1

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Re: what if - h-alpha thru 17th century optics

Post by highfnum » Tue Jul 05, 2016 9:06 pm

im going to build eyepiece slide table and try this again

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