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David L
sage
Reged: 11/12/07
Posts: 278
Loc: Lee County Iowa
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Re: home made collimating sight tube
05/11/08 09:36 PM
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From where I used to work, I saved a bunch of plastic tubes with a 1.25 inch diameter. I took a small piece of Corian plastic, drilled it out to 1.25 inches with a Forstner bit, and leaving it clamped in the drill press, drilled a small hole, the bit being guided by the dimple left by the Forstner.
Dave
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16" Lightbridge, 10" F4.5 Homemade with Orion optics, 6" F6.5 Antares 1529 refractor, 6" F8 Homemade with Orion optics, 100mm F5.6 finderscope, 22X100 Oberwerk binocs, 8.5X44 Swift Audubon binocs, Orion Atlas mount, equatorial platform, various tripods and altaz mounts
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