Actually, Marc, just to clarify, its the improved and flatter RC design, not the SCT, that's why the field is relatively flat. Thanks for mentioning that, i added some more comments to my original post to clarify that point for the readers!!
Meade redesigned the mirror system after years of the SCT design, and released it based on the RC design and called it the 'R' model, but later had to change the marketing designation from 'R' to 'ACF' for legal reasons.
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