Hi Ed, The stereo images you linked to are great. Especially the ones of the Moon in two eclipses that were years apart (a great example of long term planning). And I liked looking at the ones from the 1850s. Kind of like looking back in time. Agreed that there's little if any real stereo effect in the Hawaii/Utah images. But it was a fun experiment and, as I'm sure most here know, in science even a negative result is still a legitimate result. patrick Sent from my iPad On Mar 2, 2013, at 11:46, Ed <utnatsedj1@xmission.com> wrote:
Patrick,
In no way am I trying to belittle your work in demonstrating the parallax of the Moon against the star field background with the cooperation of the fellow in Hawaii, and also producing a stereo pair of the Moon. Since I am particularly interested in stereo images, Moon included, I did some research to see if it hadn't already been done.
As mentioned in my last post, an obvious way to get a stereo pair of the Moon was to use images from its libration cycle. I was surprised to learn how long ago that had been done - in 1859! And, by the man who invented the light bulb, no less!
This site shows stereo pairs of the full Moon from the earliest by Warren de la Rue in 1858/59 using the wet-plate collodion process to a Lunar eclipse stereo pair spanning 5 years by Tom Matheson.
This site also has a .gif movie showing libration and the apparent size changes of the Moon from October 11 thru November 8, 2007.
http://lcni.uoregon.edu/~dow/Marks_photos/stereo_pairs/Apollo_moon/Stereo_pa...
I'm sure there are many more stereo images of the Moon out there for those interested in looking further.
And, Joe, you can cross your eyes to see stereo. Really. Yes you can!
Enjoy,
Ed Stimpson