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Lots of opinions out there- but here’s my experience with a 10” Meade LX50 (non-ACF). I use the celestron 0.63x reducer and as long as the spacing is correct you can get a pretty decent result.
Attached is an unprocessed live stack with the above setup with an asi294mc (4/3 sensor) at 105.3mm spacing (integrated darks and flats). Just few elongated stars in corners as I have approx 0.2mm tilt in my setup that I’m still trying to sort out but that’s another issue! It’s fairly easy to crop or process-out these flaws but the raw image shows the real result.
Focal reducers/correctors greater than 0.63x will cause more and more issues with distortions in the edges of a larger sensor so it becomes a bit of a balancing act and depends on what kind of result you’re after.
Hope that helps
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