Hey Dunk,
I've not used the ASI178 so I can't directly answer your question. The sensor is really small though, and when combined with the Esprit 100 @ 500mm, your FOV is actually smaller than I get with the ASI 1600 and the Esprit 120 @ 840mm. Seems to defeat the purpose of using such a short focal length scope to me... just my 2c
Cheers,
Lee
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