The Cellar / Sun and Moon

**Posted by Diaphone Jim** 9/19/2024 12:40 pm

I'm not sure about this:
The Sun and the Moon | Car Talk

**Posted by Happy Monkey** 9/20/2024 12:05 pm

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

**Posted by glatt** 9/20/2024 12:39 pm

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.

**Posted by Anon** 9/20/2024 6:26 pm

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.

**Posted by Diaphone Jim** 9/21/2024 3:08 pm

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)

**Posted by griff** 9/21/2024 6:46 pm

That’s a really cool idea for a milestone celebration.

**Posted by xoxoxoBruce** 10/05/2024 5:23 pm

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)

**Posted by Diaphone Jim** 10/06/2024 10:12 pm

Gee thanks Bruce. I'll re-work the math.

**Posted by Diaphone Jim** 10/07/2024 3:14 pm

Heck with the math. It will just shorten the time by which I missed it.
Everyone interested can figure their own.