Author Topic: Springsonian (was Re: CalStar 2016 Observational Highlight Reel)  (Read 761 times)

John Pierce

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(thread split from an OR where mccarthymark mentions a "Springsonan")

any pictures of this 'springsonian' scope?
« Last Edit: October 06, 2016, 11:29:37 PM by John Pierce »

mccarthymark

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Re: Springsonian (was Re: CalStar 2016 Observational Highlight Reel)
« Reply #1 on: October 06, 2016, 04:23:28 PM »
Here it is. 

Credit where credit is due, the design is by Howard Banich (https://drive.google.com/file/d/0B0h1AUx5A9AsNTQwZjQ0MTYtNTZlNC00MjQzLWFlYjUtNDY5MTdhYzBhOGJj/view?ddrp=1&hl=en#)
Mark

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Re: Springsonian (was Re: CalStar 2016 Observational Highlight Reel)
« Reply #2 on: October 06, 2016, 10:27:31 PM »
john, you could make your new 17" into a springsonian!  He let us enjoy a few views.  No balance issues when changing eyepieces. Marc got several of us thinking. 

John Pierce

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Re: Springsonian (was Re: CalStar 2016 Observational Highlight Reel)
« Reply #3 on: October 06, 2016, 11:20:53 PM »
hahahahah, that chair would be like 83" high :-O   AND the counterweight would be like 75 lbs on the end of a 7' arm.   I doubt the existing truss rods would support the mirror box, so the whole scope structure would need to be reengineered.

however, my 10" f/4.5 Coulter is a definite candidate.   the focal length is only 1150mm,  the eyepiece is 45" off the ground at zenith...




« Last Edit: October 06, 2016, 11:30:16 PM by John Pierce »