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Super Old Coulter 4.25" 39$ Replacement Mirror Wanted

Price - $1.00

Ad Number: 231825

Posted: 17 Nov 2020

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I've been working on refurbishing an old Coulter 39 dollar kit that had been my first telescope in the early 1980's. And with this original mirror assembly, I could take this Coulter 4"F4 packed in a small under seat case into places without lights.
Now wishing to allow my grand kids their first views through a wide angle 4.25F4 dob, I wanna share the same experience I had as a young adult.
But I have found, this old Coulter primary parabolic 4/f4 mirror is scarred by the secondary falling in the heat and damaging the primary. And to take this farther, the 4 1/4/F4 has somewhere near a half wave resolution figure.
I've been a mirror maker for many-a-year yet getting older is not a way to prefigure a super short F4 for figuring.
My wishes would be for someone here on CN's to have one of these 4.25F4 primary mirror kits laying stored in a junk box, and yet to be given an new life.
Jim

General


  • Condition Usable
  • Location North Central Texas.



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