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Re: Lunars on Sep 20th. (was Re: Perpendicularity check)
From: Frank Reed CT
Date: 2004 Sep 26, 21:07 EDT
From: Frank Reed CT
Date: 2004 Sep 26, 21:07 EDT
Jan K asked:
"Frank, is your telescope inverting?"
No, it's a standard 7x35 monocular. It looks literally like half of a pair of binoculars. I think (but I don't know) that it's a fairly common accessory for modern sextants. I was pleased that my sextant, which is otherwise nothing special, included one at no extra charge. It makes a huge difference for lunars.
And:
"And please elaborate a bit on your technique of holding the sextant while taking lunars. You take the distance with both arms, then you lower the sextant and change the micrometer position by guess, look using both arms through telescope, whether this was enough and so on? Did I understand you rightly?"
Yes. That's it exactly. I only do this when I'm feeling observing fatigue. Incidentally, I try very hard not to peek at the micrometer while doing these small adjustments. Previous sights within a set can have a big influence on what "looks right" if you see the results while you're making the adjustment.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
"Frank, is your telescope inverting?"
No, it's a standard 7x35 monocular. It looks literally like half of a pair of binoculars. I think (but I don't know) that it's a fairly common accessory for modern sextants. I was pleased that my sextant, which is otherwise nothing special, included one at no extra charge. It makes a huge difference for lunars.
And:
"And please elaborate a bit on your technique of holding the sextant while taking lunars. You take the distance with both arms, then you lower the sextant and change the micrometer position by guess, look using both arms through telescope, whether this was enough and so on? Did I understand you rightly?"
Yes. That's it exactly. I only do this when I'm feeling observing fatigue. Incidentally, I try very hard not to peek at the micrometer while doing these small adjustments. Previous sights within a set can have a big influence on what "looks right" if you see the results while you're making the adjustment.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
