Re: [photo-3d] Kodaslide II

[Gabriel Jacob <3-d@xxxxxxxxxxxx>]

>I am surprised to read this... I don't think I have found
>anyone to actually see this "chromatic aberration" in the
>KII viewer.

I am surprised to read this also. :-) You mean your the only
one that can see it?

>   IMO, it is not very obvious.  You need to have
>a subject like a dark tree in front of snow, to see the blue
>edge of the tree.

I find it's obvious, I would estimate I see it in 30% of my pictures.
Maybe we take different kind of pictures? It doesn't take an extreme
example of a dark tree in front of snow to see it, although this is
would be an example where it would be the easiest to pick out. I
have many images where the people are sitting at a sofa and you
can see it against the white wall background.

>Still, A LOT of people love this viewer.

True. Which one do you love? ;-)

>A lot depends on people's expectations.  For example, the
>View-Master model D, shows a lot of very obvious chromatic
>aberration (just look through the viewer with no reel
>inside - the edges are blue) by its lens design (airspaced
>single element lenses) but that does not seem to bother
>a lot of people.  It was certainly a shock for me...

It was a shock for me to. I was disappointed with this viewer.
The quality is comparable to cheap $7 loupes. Mind you, I have
nothing against $7 loupes but when the model D is advertised
as being the best then your expectations are higher.

>  In the area of stereoviews, not many people mind the single
>element prismatic lenses used in 99.9% of the stereoscopes.

Very true, but even though they might not mind, that doesn't
mean they are not short changing themselves. One can claim
they don't notice the poorer quality of cheaper lenses. This
doesn't mean they are not seeing it (effects of poor quality)
subconsciously. With proper training they can see what they
are supposedly missing (which I maintain they have not been
missing all along, subconsciously).

>But if you try a achromatic stereoscope, there is a
>definite difference.  Once you get used to it, you will
>not want to go back to ordinary stereoscopes again.

True, but as you well know, not all achromats are created
equal.

Gabriel