The Vixen SD Reducer HD is an aplanatic focal reducer desigend to work...
The Vixen SD Flattener HD Kit includes the SD Flattener HD filed...
A 31.8mm 50.8mm Adapter For External Focuser MewlonWhen Using The Eyepiece 50.8mm With External Mewlon Focuser You Can Use Accessories 31.8mm Quickly Through This Ring Of Reduction.
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