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1 of 1- Diaphone Jim
- Not Ignoring You.
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Sun and Moon
I'm not sure about this:
The Sun and the Moon | Car Talk
- Happy Monkey
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Re: Sun and Moon
Probably depends on the stubbyness of your arms and pinkies. But I can believe it works for some particular sizes of obstruction, and that it may be likely that your pinky is within that range.
I took this pic last night, but didn't try to block it out....
20240919_214549
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- glatt
- TM
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Re: Sun and Moon
Very nice picture HM.
Regarding the pupil dilation thing...
I understand there are now eyedrops approved for distance vision improvement instead of corrective lenses. They work by constricting your pupils until they are little pinhole cameras. They come with a warning to avoid using them at nighttime while driving.
- Anon
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Re: Sun and Moon
The smaller the aperture (larger the f-number), the greater the depth of field. At nighttime, the eye's dilated pupil is about f/2.5. In daylight, the constricted pupil is about f/13. The drops probably constrict them into the f/16 - f/22 range after which there may not be any more increase in sharpness to be had.
- Diaphone Jim
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Re: Sun and Moon
Speaking of moons, I am sure that humans have been counting the days between full moons for hundreds of thousands of years. It is a staple of American Western movies, e.g. "many moons ago."
I got to thinking a few days ago that one's thousandth full moon is (or should be) an important and exciting milestone.
I went to a "days between" calculator, got my life span in days and divided it by 29.5 (close to, but not exactly, the number of days between full moons).
Darn! I missed mine by about two and a half years.
Right now (always, for that matter) your 1000th comes a few months before your 80th birthday.
I guess I'll have to wait for a miracle and my 2000th.
Happy 1000 Moons!
Link: Days Between Dates Calculator (omnicalculator.com)
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Thread Starter- griff
- A Magical Woodland Creature
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Re: Sun and Moon
That’s a really cool idea for a milestone celebration.
If you would only recognize that life is hard, things would be so much easier for you. - Louis Brandeis
- xoxoxoBruce
- The Future is Unwritten
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Re: Sun and Moon
Then again your first year or so you might not have seen a full moon, and I'm sure slept through others.
So you're taking the word of others that those full moons actually happened. 
Edit - Hey wait ... 80 years x 365 days = 29,200 divide by 29.5 = 989.3
So it would be about 10 months AFTER your 80th birthday.
Or did I screw that up?
Edit2 - 80 years x 365.25 days = 29,220 divide by 29.5 = 990.5
Make that 9½ months after your 80th.
Last edited by xoxoxoBruce (10/05/2024 5:49 pm)
Freedom is just another word for nothin' left to lose.
- Diaphone Jim
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Re: Sun and Moon
Gee thanks Bruce. I'll re-work the math.
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Thread Starter- Diaphone Jim
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Re: Sun and Moon
Heck with the math. It will just shorten the time by which I missed it.
Everyone interested can figure their own.
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Thread Starter