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More Information Price $159.00 Warranty 1 year

A single large hand-tighten knob locks each black-anodized ring into place on an optional Meade Series 5000 or Losmandy D-series dovetail plate with no tools required. A simple twist on the knobs lets you move the rings back and forth along the dovetail plate to help balance your scope.

They will hold optical tubes with an o. d. of 3.1" to 4.75". Optical tubes with the latter tube o.d. are a very tight fit and allow for very little collimation range. A 4.25" o.d. tube would be a more reasonable maximum. There are three large hand-tighten adjustment screws with non-marring Delrin tips in each ring. These allow you to collimate the refractor with the main scope optics when it is used as a finderscope, or to aim the refractor off-axis to locate an appropriate guide star or photographic target when it is used as a photoguide or astrograph.