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Have you compared images after you've played with and fixed the collimation on your Tak? Collimation doesn't just effect the stars but also messes with fine details making them appear washed out (as they're also not correctly resolved). Being at F/3.3, it is quite critical.
You may be able to fix star shapes with collimation not being perfect but it will most definitely effect resolution and fine detail.
I have to admit, this is one of the very few images of the region that I can actually see a chicken!
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