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Home > Classifieds > Astromart Classifieds > Filters > Classified #171511

For Sale: Orion Collimating Eyepiece SOLD

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It's a combination sight tube and Cheshire eyepiece, consisting of a 5"-long tube made of black-anodized aluminum. There's a picture in the Orion on-line catalog. It fits in a 1.25" eyepiece holder. A peephole in the top and wire crosshairs at the bottom enable precise centering of Newtonian optical components. The polished 45° internal surface projects an annulus of light into the optical path to facilitate primary mirror alignment. In mint condition. Orion lists it for $34.95; I will take $25 shipped in CONUS. Rob Williams

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