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Baader Neutral Density Filter 2″ (ND 1
installed over a Vixen or Losmandy plate positioned above the telescope support ring: if you install a Vixen or Losmandy PLUS plate above the support rings of your telescope
making it a versatile and powerful addition to any solar system
Excellent central wavelength stability with minimal temperature-induced shift
Dark Clear Skies M54M to M42M Back Focus Spacer – 1.5mm lunar observation Baader Neutral Density Filter 2″The Dark Clear Skies M54M to M42M Fine Back Focus Spacer (1. 5 mm) is a precision machined spacer designed for fine adjustment of back focus distance in astrophotography imaging trains. Purpose & Use Many telescope reducers and field flatteners require a precise back focus distance to deliver optimal star shapes and edge correction. Small spacing errors of even 12 mm can noticeably affect image quality, particularly with fast optical systems and
