Wojtek's assertion intrigued me, and I can't resist sharing my calculations.

The best results would be taken at the equator where two shots taken 12 hours apart would give a stereo base of 6378 km. [1]

If you can do this at perigee, whenever that is?and time your trip for a full moon!?the moon's distance will be 384,405 km. [2] and the ratio of base to target distance about 1:56.

The mostly accepted ideal is 1:30, so this is clearly not ideal, but strikes me as not a washout.

You could experiment at home with stereo images of things at 1:56 and see how well it turns out before you plan your trip.

BTW, I estimated my stereo base in Washington, D.C., to be 1434 km, resulting in a ratio of 1:249, so I will not attempt such from home.

[1] http://en.wikipedia.org/wiki/Earth

[2] http://www.fourmilab.ch/earthview/moon_ap_per.html

?Ken Nellis

On Jun 26, 2010, at 5:27 PM, Wojtek Rychlik wrote:

 

Imre,
The Earth size is not large enough to make a nice 3d shot of the Moon. In the perigee it works only so so.
Best is when you wait a few months, not necessarily 6. Just 1 month will give you a better base than and simultaneous 2 shots from the Earth.

Cheers,
Wojtek

On Jun 26, 2010, at 3:14 AM, Imre dr.Zsolnai-Nagy wrote:

> Sorry...the attachment is here!
>
> Imre