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Hi Ben, Yes, 8" Newt. All reflectors display diffraction spikes, 1, 2,3, or 4 depending upon how many supports the secondary mirror has. Mine are split because the alignment of all the parts of the optical train hadn't been checked and adjusted for a long time. I only generally only did that annually or
thereabouts. When the secondary mirror support vanes are perfectly
parallel with the scope's tube, and all else is correctly adjusted, the
diffraction spikes will be perfect.
raymo
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