Quote:
Originally Posted by dvj
Thank you! At f/3.8, orthogonality of all the components help with this. I've replaced the original drawtube with an FLI Atlas digital focuser and the STL camera was factory shimmed a long time ago to improve the array flatness. This goes a long way for sharp stars across the field. What I thought originally was a bit of tilt, I'm actually experiencing a bit of differential flexure with my separate guidescope. Perfectly round stars when I use the internal STL guider. The problem is that the old STL guider is behind the filters! So, time for an upgrade.
Roland did it right on this one. Why the last scope sold for nearly $28K USD.
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You've done well & it shows in the results.