Re: [photo-3d] Chromatic aberration / chromostereopsis

["Dr. George A. Themelis" <drt-3d@xxxxxxx>]

> In a holmes viewer, because of the _prismatic_ element in the optics,
> chromatic aberration is in opposite directions for the left and right
> views.

Thanks Boris and John for the detailed explanations.
Now we need someone to photograph the effect
for Monte.

The reason I have missed this is that I usually freeview prints
or use good viewers.  I don't use the cheap plastic ones.
And in slide viewers this is not an issue because of the
symmetry of the lenses.

Only when I use the cheap Radex viewer to view relatively
flat stereo pairs, I notice a spherical distortion as if the
flat image is painted on the surface of a sphere.  If the
image has depth then you don't notice this.  Which brings
two comments in my mind: 1) to test lenses for depth
aberrations it is better to look at a flat image.  2) While
relatively flat stereo pairs still look great in a quality viewer
(pictures are sharp, image is enjoyable as if the real distant
scene is viewed with bare eyes), the same "flat" stereo
pairs look terrible in cheap viewers because all the
"depth" comes from distortions.

George Themelis