Astrodymium Fine Adjustment Spacer Rings (M42/M48/M54/M68, etc) - 5

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These rings slip over the thread of an adapter/extension tube and are primarily used for fine tuning backfocus for astrophotography, but they can be used for other purposes as well.

Custom spacer sizes, thicknesses, and quantities can be made to your specifications for an additional fee. Please contact me for this service. 


General:
  • M42
  • M48
  • M54
  • M56
  • M68
Takahashi:
  • M43
  • M72
  • M92
APM-Riccardi:
  • M63
  • M82
Astro-Physics:
  • 2.7" (M70)

Details:
  • Each set comes with 12 individual spacer rings, with 4 different thicknesses. 3 of each are included: 0.4/0.6/0.8/1.0 mm.
  • The width of the rings is 3.95 mm, with a 0.5 mm larger inner diameter for good clearance. 

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This item is made out of PETG plastic and can handle up to 75C (167F) temperatures without deformation.

Transaction will be conducted through my online store (See my profile for the website URL).