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Old 04-03-2010, 10:22 PM
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tonybarry (Tony)
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Join Date: Aug 2007
Location: Penrith, Sydney
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Meade ACF optics and focal reducers

Hello people,

The Meade SCT scopes have two focal reducers made by Meade to reduce the focal length - the f/6.3 reducer and the f/3.3 reducer.

Both reducers apparently reduce distortion at the periphery of the image when used on the standard SCT. That is, to my ignorant mind, they act as field flatteners.

My question is; do these reducers also work correctly on the ACF optics, since the field is supposed to be flat out to the periphery already? Or do they introduce too much flatness (i.e. curvature in the other direction) and bugger up a previously flat field?

If they do bugger the ACF field, what methods are available to reduce the focal lengths of Meade ACF SCT scopes?

I have looked for these answers on other sites but have not found an unequivocal answer.

Regards,
Tony Barry
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