Coronado Adapter Plate #AP186. Required to double stack an SME60 external primary Etalon, double stacking an original 60mm Coronado or Coronado II telescope such as an SMT60. Telescope and double stacking filter sold separately.
Reduces original .7 angstrom bandpass of the Hydrogen-Alpha telescope to .5 angstrom, dramatically increasing visibility of surface detail such as granularity and active regions on the surface of the Sun.
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