what if - h-alpha thru 17th century optics

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what if - h-alpha thru 17th century optics

Post by highfnum »

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 »

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 »

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 »

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 »

quick drawing to give field of view feeling
Image0138.JPG


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

Post by marktownley »

Very impressive John! An interesting configuration :)


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

Post by zorgdotnl »

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 »

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


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

Post by highfnum »

i think pics are back but 1


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

Post by highfnum »

im going to build eyepiece slide table and try this again


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