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Thanks for sharing the precious experience. I'll let my eyes rest for a day or two before I continue the project. BillC, I wish you a speedy recovery.

Just curious, what do you guys use to adjust the objective lens? I just use my fingers and that smudge up all over the lens. I am afraid that would affect the lens' coating, in case it is coated. You can tell how inexperienced I am.

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First: THANK YOU!

Next, while using a Mark 5 collimator I use “machinist’s scribe.” It’s pretty universally used. HOWEVR, 3 generations before, many OMs or “Precision Artificers,” as they we known at the time, used a set of eccentric rings that were made to just fit the eccentric rings of the binos. That way BOTH could be turned at once, and the observer never lost sight of the target. They were a more talented generation.

Also, 2000 nautical yards is what we had to use when no collimator was available.

Also also (sic) oil from the skin is more caustic to coatings—I know, I experimented in the fleet. HOWEVER, unless coatings were put on too cold there should be no broblem. Tho optical tinkerers have a proclivity for thinking and worrying about WAY too much!

Cheers,

Bill

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William J. Cook, Chief Opticalman, USNR-Ret.
Founding Editor, Amateur Telescope Making Journal
20-year vet. of Captain's Nautical Supplies, Optics Dept. Mgr.
Optics Machanic, WG11-3306, Ft. Lewis, Tacoma,WA
Yata, Yata, Yata . . .

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