That reducer is more appropriate, but the illuminate circle is quite small, so you'll be limited to small chips like the KAF8300. Read the PDF one the AP site about how the distance between the reducer and the chip varies reduction and the illuminated circle - from my experience it is spot on.
I think you can use the bigger AP 2.7inch reducer on a Meade 12 inch because they have a 3 inch visual back.
DT
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