Thread: Double diffraction spike on Newtonian
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Old 26-03-2023, 07:03 AM
Stefan12
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Join Date: Sep 2012
Location: New Zealand
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Double diffraction spike on Newtonian
Hello,
I have a 10 inch ONTC Newtonian and noticed I'm getting a double (split) diffraction spike on the right spike.The Newtonian has a TS double vein spider on the secondary mirror. Because the spider veins are so thin, I wonder whether one is slightly twisted?!
Any ideas?

I've attached a couple of images

Cheers
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