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My coma corrector is an integrated part of my focuser and I just forget it's there, and I never think about coma. Having a big 100 degree eyepiece in a Paracorr is a big setup to have in your focuser, but I see plenty of people use that setup. If you don't want to do it that way you will have to get used to the coma.
I found my Ethos without the Paracorr is still ok, it's there but not too objectionable, they may be better corrected for coma than the ES. All these little improvements explain why Ethos are more expensive.
You won't notice much coma at all in the Delos because of the narrower FOV. You can get away without a Paracorr using them.
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