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Expansion Ring M55 to M68

SKU M68/M55 (Baader #2458234)

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Expansion Ring M55ext to M68int

This adapter allows you to change your Baader 2" Diagonal Mirror (# 2456115, 2456117, 2456100) or Prism from M55 internal thread (# 2456120) to M68 internal thread. This allows you to integrate the diagonal into a larger 68mm light path without choking down the aperture.

To attach the adapter to your mirror you must first remove the 2" nosepiec and the M55 / 2" UNC threaded ring from the housing of the diagonal.  We recommend using spanner wrench # 2450062.