Solar Eclipse, August 21, 2017, Beaverton, OR

Wes Hayward, 21 August 2017

Although our kids and their families had made arrangements to travel to eclipse totality, we elected to view it from our back yard.   This turned out to be a lot of fun, for several of the neighbors joined us.   They brought their lawn chairs, special glasses, some kids, and one dog.   I built a projector consisting of a "backwards" monocular mounted on a small backpacking tripod.   The monocular was just a small (2 oz) instrument that I often take with me on walks when I want to look at the mountains.   The result was a sun image that was 1 to 1.5 inches in diameter.    I could get a larger diameter by moving the tripod away from the screen, but the intensity then suffered.   I also had a classic cardboard box, but the projected image was then very small.

  This shot was taken well into the morning, approaching the darkest point for us.   We had 99.5% darkness, still far from the total experience that others enjoyed.    It did get cool, but there were no birds chirping at the wrong times.  

The following shots were taken with the apparatus shown above as we progressed through the morning.    The optics inverted the images.    Each is labeled with the time in Pacific Daylight.

9:12 AM      9:39             9:48

10:00                10:02            10:10

  10:12                  10:14            10:19

10:22               10:26         10:46

10:50              10:57          11:06

11:29                11:35

Some of the photos are distorted because I took the picture with the camera at an angle other than the preferred normal.

Finally, here's a shot of the monocular on the tripod.
   
I saw a brief, but very well done NASA video about building these projectors.   See
https://eclipse2017.nasa.gov/solar-viewing-projector