Re: And you thought LF stereo was exotic enough hobby

[Tom Deering <tdeering@xxxxxxxxxxxx>]

>Tom Deering wrote:
>
>> >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
>
>It is pretty much an experimental excercise rather than a practical way to
>take
>pictures.  Zone plates a highly chromatic "lenses" with poor off-axis
>performance, and always form superimposed images with a converging focus at
>"+f" and diverging focus at "-f", resulting in poor contrast (some would
>interpret this as a desirable "artistic" effect).


Whew!  Good answer!  I understand it a wee bit more, at least.

Thanks.

Tom