[MF3D.FORUM:1666] List intros request

["Matthew V. Ellsworth" <oakridge@xxxxxxxxxxxxx>]

Thanks to Paul Talbot for starting these very interesting Introductions.

Here’s my version:

In college I took an aerial photo interpretation course. Most of the
print images were 9 inch square contact prints of 9 inch negatives (sort
of on the high side of MF, I guess). Aerial photo flights are often
flown with 20% side lap and 55 percent overlap – This provided
stereoscopic coverage of all places on the ground even if the plane was
not perfectly positioned when each photo was taken. Full 9” prints were
usually viewed with large reflecting stereoscopes with first surface
mirrors and lenses with flip down optics for various magnifications.
Additionally, small portions of prints could be viewed stereoscopically
using simple lens stereoscopes (with about 4” focal length) by folding
the prints in order to get analogous parts of two prints within about
65mm.

Latter, I worked at an aerial photo company taking, developing,
printing, and mapping with these images. After bouncing up and down in
the back of an airplane, keeping the camera aligned, I understood more
fully why the extra percentage of overlap on the sides and ends of each
image were the standard to assure full stereoscopic coverage.

Later, but before I knew about the availability of things such as
Realists or other ready made stereo cameras I hacked a variety systems
to quickly and accurately move single cameras from one position to the
other. Again, still not knowing about the availability of stereo viewers
I hacked individual slide viewers together for stereo viewing. My
furthest diversions below my current interest in MF stereo were my
attempts at making Viewmaster reels using 110 size sides and old
commercial Viewmaster reels (That requires accuracy!)

About 10 years ago I put 2 MF Yashica TLR’s on a bar and shot some views
of excellent scenes, but not understanding how to calculate how close
the nearest object should be, I got a lot of bizarre stereo.
Now I’ve gotten the twin Yashicas out again – and encouraged by the
information of this list, the viewing of several of Paul Talbot’s MF
pairs, and the stereo basics I’ve picked up over the last 10 years, I’m
anxious to start some new, high level hacking and experimenting.

Matt


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______ Matthew V. Ellsworth ______________________________
      oakridge@xxxxxxxxxxxxx      http://www.oak-ridge.com