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Gert
member
Reged: 04/15/08
Posts: 33
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Hi All,
I'm trying to figure out the usability of the Antares SCT reducer for my 12" Meade ACF.
Is it:
A) a reducer
B) a reducer / field flattener
C) a reducer / (coma) corrector
D) a reducer / field flattener / (coma) corrector
As you know the ACF (formerly known as RCX) is (by design / hopefully) coma free. So having extra coma correction in the 'reducer' would result in coma 'the wrong way'.
My preferred way would be 'B' to deal with the remaining curvature on top of the reducer function.
Your input is appreciated.
Otherwise, do you know other products that would perform the desired combination?
Thanks & Clear Skies,
Gert
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skywolf856
journeyman
Reged: 01/25/08
Posts: 9
Loc: New Baltimore, Michigan (North...
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Gert,
I have the Antares 6.3 Reducer for my Celestron C6SCGT
I found this description for the Antares at telescope-service web site:
http://www.telescope-service.com/Antares/start/antaresstart.html
It says it's f /6.3 Focal Reducer and Field Flattener for Schmidt-Cassegrain telescopes.
I'm very happy with the performance of mine!
Otherwise I would contact Antares directly and ask the question.
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GlennLeDrew
Pooh-Bah
Reged: 06/18/08
Posts: 1267
Loc: Ottawa, Ontario, Canada
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My instnct tells me that option 'A' is most likely what you need, as (I believe) the ACF already has a fairly flat field. But unless the reducer is optimized for an already flat field, it could compromize off-axis focus by introducing some field curvature. The safest bet would likely be to source a reducer designed specifically for the ACF. Failing its availability, a reducer made for any long-ish focal ratio, flat field instrument could possibly work well enough.
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