Julie, Humans are capable of seeing in stereo because our eyes are separated about 3 1/2 to 4 inches apart. Our brain interprets the difference between the two images in our eyes caused by the parallax in viewing near objects from slightly different angles, thus we see in stereo. If we want to simulate stereo (depth perception) of different objects that are distant, we can take two photos of the same target taken with cameras that are widely spaced apart. Then if we look at one of the images with our left eye and the other with our right eye, our brain does the same interpretation and we can see depth perception of distant objects because it is as if our eyes were widely spaced apart. In this experiment, Patrick and Rob each took a photo of the moon, one in Utah the other in Hawaii (about 5,000 miles separation). The moon is about 240,000 miles away and so the separation of the images is only about 0.02 degree which is not enough to see much stereo particularly given the fact that from the center of the moon to its edge is only about 1,000 miles difference in distance. Thanks Rodger Fry -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Julie Clyde Sent: Thursday, September 23, 2010 12:34 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Do you see stereo? Stupid question.. what is this stereo effect you're all talking about? On Thu, Sep 23, 2010 at 12:30 PM, Daniel Holmes <danielh@holmesonics.com>wrote:
Hadn't thought of that Rodger. I just chalked it up to the fact that I have no depth perception...
Dan
On Sep 23, 2010, at 12:22 PM, Rodger C. Fry wrote:
With the moon being 240,000 miles away and Maui only about 5,000 from Utah, this makes the angular view about .02 degrees. This is not enough to expect to see stereo effect. Thanks Rodger Fry
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Kim Sent: Thursday, September 23, 2010 11:44 AM To: 'Utah Astronomy' Subject: Re: [Utah-astronomy] Do you see stereo?
I tried, but sorry, I couldn't see a stereoscopic effect.
Kim
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Patrick Wiggins Sent: Thursday, September 23, 2010 4:01 AM To: utah astronomy utah astronomy listserve Subject: [Utah-astronomy] Do you see stereo?
Rob on Maui and me here in Utah got some shots of the Moon tonight. Both of us were using C-5s operating at 1,250mm f/10.
He has one of those pesky j-o-bs to go to in the morning so he wasn't able to stay up long enough to process and send me his first rate stuff (hopefully he'll be able to do that later today) but he did send one of his test images earlier in the night.
When I put one of my shots next to his test shot I think I'm seeing stereo. But maybe not.
Here's the image: http://users.wirelessbeehive.com/~paw/temp/stereo01.jpg
Anyone else seeing any signs of stereo?
Mine (on the left) was taken at 0900 UTC while his test shot was taken about 0630.
The ones he's sending later today were taken at the same time as mine.
Thanks,
patrick _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
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