[stereogram] Leeds Castle

On Apr 8, 10:05*am, Troy Piggins wrote:
Never really tried one of these. *Was at Leeds Castle and thought
this shot would really suit a cross-eye stereogram so had a go at
it. *Work for you?

http://piggo.com/~troy/photos.php?al...photos/2008_04....

--
Troy Piggins
I always appreciate critique.

Great work. I liked David's as well.
I've done a few of these in the past and plan on doing more soon.

* Annika1980 wrote:
On Apr 8, 10:05*am, Troy Piggins wrote:
Never really tried one of these. *Was at Leeds Castle and thought
this shot would really suit a cross-eye stereogram so had a go at
it. *Work for you?

http://piggo.com/~troy/photos.php?al...photos/2008_04...

Great work. I liked David's as well.
I've done a few of these in the past and plan on doing more soon.

Thanks mate. I'm going to keep an eye out, or should that be
/eyes/ out, for shots/scenes that might lend themselves to
stereograms from now on. They're kind of fun. Maybe the novelty
will wear off, but you never know.

--
Troy Piggins
I always appreciate critique.

In rec.photo.digital.slr-systems William Graham wrote:

"Lawrence Glickman" wrote in message
...
On Thu, 10 Apr 2008 18:00:02 GMT, "er" wrote:

I once had a pair of artillery spotting binoculars with about two feet
of separation between the objectives. You got excellent stereo depth
discrimination at considerable distances.

Woah !!

And I thought that I had a big, wide head.

well, there is something unusual about your head, based on your
comment.

The ocular lenses are the one's at your eyes...the objective lenses
are the one's he is referring to, which are at the other end.

Yes, and the further apart they are, the smaller it makes anything you take
seem......When they are two and a half inches apart, everything will look
normal, but if they are a couple of feet apart, it will make a landscape
scene look like a model scene set up on a table.

They don't make things look smaller. They give distant things the
precise clear stereo distance separation you normally only get with
close things. So there is a feeling of them being closer due to
that. But you see them at whatever size the optics cares to magnify
them to. The point was being able to make accurate assessments of the
ranging of artillery shots in the field. Without such an aid in
complicated terrain it's often hard to tell whether a shot is a little
bit short or a little bit long if all you can see is the puff of smoke
and dust.

Note that most binoculars do a little bit of this by just using the
prism step to move the objectives a bit further apart.

A similar idea was used in the giant stereo ear trumpets they used to
use to try to pin point by the sound exactly where a distant long
range gun was, in this case in effect increasing your ear separation to
a few yards. That gave you very accurate direction.

--
Chris Malcolm DoD #205
IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
[http://www.dai.ed.ac.uk/homes/cam/]