Quote:
Originally Posted by Windston
Hi
So I recently did a re-haul of my imaging setup, and the start me off in the world of GEM's, I picked up a really nice Celestron 130SLT OTA that has been hardcore modded for imaging! It is a beast of a little scope!
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Looks like my old 5" newt that I sold to Richard (rmuhlack) couple of years ago. Simple fix: your secondary offset is too big so your vanes are not square and the diffraction spikes don't overlap. You need to recenter your secondary. Here's
an old shot with the same scope of what it will look like when it's collimated.