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Post by astrotrailer on Feb 22, 2015 16:50:29 GMT -5
I have built a solar telescope using a istar 180mm f12 objective. The solar beam is feed into the scope using a two
mirror coelostat system. A spectroscope is attached to the scope in the hope of obtaining spectroheliographs of the
Sun. I also have an PST modification that I can use to obtain Ha images.
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Post by astrotrailer on Feb 22, 2015 19:28:04 GMT -5
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Post by astrotrailer on Feb 22, 2015 19:43:48 GMT -5
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Post by astromanuk on Feb 23, 2015 6:28:02 GMT -5
What a wonderful setup! It looks very new, have you any images taken through the system yet? I am having difficulty seeing how the beam is directed from the photos. I am assuming that the lower mirror tracks the sun and the upper is fixed - but it appears that both are driven?
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Post by astrotrailer on Feb 23, 2015 14:14:09 GMT -5
Yes the lower mirror rotates at 48 hr/rev. but is placed at different locations during the year so upper mirror is positioned so that the beam is horiz. to the scope. The scope has not been yet placed in service as I am waiting on the correct drive motor for the primary mirror.
Ralph
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Post by astromanuk on Feb 24, 2015 13:29:11 GMT -5
Hi Ralph,
An elegant solution to ensure the mirrors are not used at too steep an angle. Looking forward to seeing some results when you have the motor. The objective lens should give some lovely high resolution views. I like the idea of having a stationary telescope with comfortable eyepiece position.
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