Tuesday, September 23, 2014

Smoke Vacation! Sept. 23, 2014

Yesterday late afternoon - the ground-level smoke had cleared somewhat
I took this picture to show the charming old sawdust-burner, from when this was a lumbermill, all grown-over with a vine. It's turning color at the top - not sure if too much sun/too little water, or fall color. And also to show the exaggerated atmospheric perspective given by the smoky low visibility.

The last time we were having smoke for weeks on end, from over a 1000 fires* caused by one set of lightning storms, I was wondering just how smoky it was in Renaissance Italy, when artists discovered the idea of atmospheric perspective. (How things get fuzzier, lighter, and bluer with distance, caused by more atmosphere between us and them with more distance.)
This was about noon today!
Today visibility is much lower; that further hill which just showed yesterday is gone today. (Maybe just a ghost there.) Normally, I think I remember, there's another hill or two to see...

And the air smells much smokier. So glad I had a chance to open up the house for a while yesterday evening to air out - my rooms had been closed up for 3 days - and even more glad that I was awake in the middle of the night to close it all up again, including the floor which was open before.

*This time it's one giant fire to our Southeast. It's West and Southwest of Lake Tahoe. The King fire.

And the college campus, as well as the high school, is closed today. We've had snow vacation before, but smoke vacation? That's a new one to me.

Labels: , , , , , , , , ,

Tuesday, July 23, 2013

Full moon puzzle

full moon mandala photo, @15 sec. July 22, 2013 1am
The full moon was clear and bright in a black sky. The exposure was 15 seconds, f6.3, with a tripod.

Apparently that was enough time for the close bright moon to light up the surrounding sky.

I don't know why the photo has a star shape, with hexagonal patches of light, and a greenish sky color, but I like it.

Labels: , , , , ,

Saturday, July 06, 2013

Now that I've posted a sun halo, I guess I should show a sundog

picture from fall 2011
This picture is of a sundog, related to the halo. Often they come in pairs; this one was single. Called sundogs because they follow the sun around. There can be one on each side of it, at 22 degrees.

Since I learned that they exist, I've been seeing them 3 or 4 times a year. Before that, I never saw them, even during the years I worked outdoors, until the end when I knew about them.

This is the best one I've seen.

Update: for best sky pics, especially without a polarizing filter, try lowering your exposure by a stop or even 2 stops. Or, of course, do that afterwards in Photoshop by adjusting the exposure setting.

Aligned hexagonal ice crystals in the upper atmosphere. This one shows the prism-effect of spectral colors too.

Labels: , , , , , ,

Thursday, June 20, 2013

Halo around sun, June 18, 2013

Picture of sun halo, June 18, 2013
And I got a picture.

Unfortunately, too large to fit in the camera's field-of-view.

Ice crystals in the high atmosphere. . .

Labels: , , , , , ,