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ASA Cassegrain / Ritchey-Chrétien

Questions regarding Cassegrain or Ritchey- Chrétien ASA 400/500/600 

3 topics in this forum

  1. Spectroscopy: RC or Classical Cass?

    By Chocolate Elephant,
    • 2 replies
    • 2.3k views

  2. Other 400C users

    By nakbrooks,
    • 4 replies
    • 1k views

  3. How to collimate 400mm classical cassegrain

    By nakbrooks,   
    • 2 replies
    • 4.4k views
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