Re: And you thought LF stereo was exotic enough hobby

[Greg Erker <erker@xxxxxxxxxxxxxx>]

>>Here's a guy doing lensless stereo using zone plates:
>>http://www.neenas.com/depthography/jones.html
>
>
>After viewing his page, I still don't understand what zone plates are.  His
>explanation wasn't very clear.  And when I freeview his stereo pairs, they
>look like blurry, poorly matched cha-chas.
>
>I can't say I cared for the images.  Maybe it's like building a model steam
>engine--a historical experiment.
>
>Tom

Snipped from the cameramakers list. One of the URLs
has a nice drawing of a zone plate:
    The zone plate makes use of diffraction between a series of concentric
    light and dark rings.  It is related to the fresnel lens, and I think that
    you can think of a pinhole as the degenerate case of a zone plate.  Some
    links if just found from a quick web search are (there are many more):

      http://www.xmission.com/~ralcon/zonequ.html
      http://www.neenas.com/depthography/jonesbig02.html
      http://members.aol.com/hbellmerjr/JSlensless.html

---end---

  His images did look very low res. I was wondering if
it was from the source or just the small web jpegs.

Greg