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ring alignment

An Einstein ring, also known as an Einstein–Chwolson ring or Chwolson ring (named for Orest Chwolson), is created when light from a galaxy or star passes by a massive object en route to the Earth. Due to gravitational lensing, the light is diverted, making it seem to come from different places. If source, lens, and observer are all in perfect alignment (syzygy), the light appears as a ring.

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  1. ScottInPDX

    Wheeler Scope Ring Alignment and Lapping Kit, Unused

      1. For Sale
      2. For Trade
    • $50
    • Tualatin
    • Oregon
    Scope ring alignment and lapping tool kit for 1" and 30mm rings. Open box, never used. Trade interests: Mags Full size 1911, 45 ACP, 7, 8 or 10 round, Colt, Mec-Gar, Check-Mate, or Wilson Combat only Ruger Mark IV, either standard or 22/45 patterns, OEM only Browning Buckmark, OEM...
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