Quote:
Originally Posted by multiweb
They already do them for the aplanatic celestron range wich are coma free but it's because they have a glass corrector inside the baffle tube. Is it the same system on the Meade ACF? What is the f ratio of your primary? I know the hyperstar is not done on the C9 SCT for instance because the primary is not close to F/2 like the rest of the range C8/C11/C14. It's much flatter and the secondary as a lower magnification too.
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It's not a glass plate, its a set of lenses designed to project a flat field. Also the corector plate is a different design, hence for hyperstar to work a spacing ring is required to move further away from the primary mirror. In short they are different to the ACF.